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Microsoft Bing
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Key Information
| Microsoft Bing | |||||||
|---|---|---|---|---|---|---|---|
| Developer | Microsoft | ||||||
| Initial release | App launched July 2014 | ||||||
| Stable release(s) [±] | |||||||
| |||||||
| Operating system | Android, iOS, Windows 10 and 11 | ||||||
| Type | Search engine | ||||||
| Website | www | ||||||
Microsoft Bing (also known simply as Bing) is a search engine owned and operated by Microsoft, it is developed by Microsoft AI. The service traces its roots back to Microsoft's earlier search engines, including MSN Search, Windows Live Search, and Live Search. Bing offers a broad spectrum of search services, encompassing web, video, image, and map search products, all developed using ASP.NET.
The transition from Live Search to Bing was announced by Microsoft CEO Steve Ballmer on May 28, 2009, at the All Things Digital conference in San Diego, California. The official release followed on June 3, 2009. Bing introduced several notable features at its inception, such as search suggestions during query input and a list of related searches, known as the 'Explore pane'. These features leveraged semantic technology from Powerset, a company Microsoft acquired in 2008. Microsoft also struck a deal with Yahoo! that led to Bing powering Yahoo! Search.
Microsoft made significant strides towards open-source technology in 2016, making the BitFunnel search engine indexing algorithm and various components of Bing open source. In February 2023, Microsoft launched Bing Chat (later renamed Microsoft Copilot), an artificial intelligence chatbot experience based on GPT-4, integrated directly into the search engine. This was well-received, with Bing reaching 100 million active users by the following month.
As of April 2024, Bing holds the position of the second-largest search engine worldwide, with a market share of 3.64%, behind Google's 90.91%. Other competitors include Yandex with 1.61%, Baidu with 1.15%, and Yahoo!, which is largely powered by Bing, with 1.13%.[6] Approximately 27.43% of Bing's monthly global traffic comes from China, 22.16% from the United States, 4.85% from Japan, 4.18% from Germany and 3.61% from France.[7]
History
[edit]Background (1998–2009)
[edit]MSN Search
[edit]

Microsoft launched MSN Search in the third quarter of 1998, using search results from Inktomi. It consisted of a search engine, index, and web crawler. In early 1999, MSN Search launched a version which displayed listings from Looksmart blended with results from Inktomi except for a short time in 1999 when results from AltaVista were used instead. Microsoft decided to make a large investment in web search by building its own web crawler for MSN Search, the index of which was updated weekly and sometimes daily. The upgrade started as a beta program in November 2004, and came out of beta in February 2005.[8] This occurred a year after rival Yahoo! Search rolled out its own crawler. Image search was powered by a third party, Picsearch. The service also started providing its search results to other search engine portals in an effort to better compete in the market.
Windows Live Search
[edit]
The first public beta of Windows Live Search was unveiled on March 8, 2006, with the final release on September 11, 2006 replacing MSN Search. The new search engine used search tabs that include Web, news, images, music, desktop, local, and Microsoft Encarta.
In the roll-over from MSN Search to Windows Live Search, Microsoft stopped using Picsearch as their image search provider and started performing their own image search, fueled by their own internal image search algorithms.[9]
Live Search
[edit]
On March 21, 2007, Microsoft announced that it would separate its search developments from the Windows Live services family, rebranding the service as Live Search. Live Search was integrated into the Live Search and Ad Platform headed by Satya Nadella, part of Microsoft's Platform and Systems division. As part of this change, Live Search was merged with Microsoft adCenter.[10]
A series of reorganizations and consolidations of Microsoft's search offerings were made under the Live Search branding. On May 23, 2008, Microsoft discontinued Live Search Books and Live Search Academic and integrated all academic and book search results into regular search. This also included the closure of the Live Search Books Publisher Program. Windows Live Expo was discontinued on July 31, 2008. Live Search Macros, a service for users to create their own custom search engines or use macros created by other users, was also discontinued. On May 15, 2009, Live Product Upload, a service which allowed merchants to upload products information onto Live Search Products, was discontinued. The final reorganization came as Live Search QnA was rebranded MSN QnA on February 18, 2009, then discontinued on May 21, 2009.[11]
Beginnings (2009)
[edit]Rebrand as Bing
[edit]Microsoft recognized that there would be a problem with branding as long as the word "Live" remained in the name.[12] As an effort to create a new identity for Microsoft's search services, Live Search was officially replaced by Bing on June 3, 2009.[13]
The Bing name was chosen through focus groups, and Microsoft decided that the name was memorable, short, and easy to spell, and that it would function well as a URL around the world. The word would remind people of the sound made during "the moment of discovery and decision making".[14] Microsoft was assisted by branding consultancy Interbrand in finding the new name.[15] The name also has strong similarity to the word bingo, which means that something sought has been found, as called out when winning the game Bingo. Microsoft advertising strategist David Webster proposed the name "Bang" for the same reasons the name Bing was ultimately chosen (easy to spell, one syllable, and easy to remember). He noted, "It's there, it's an exclamation point [...] It's the opposite of a question mark." Bang was ultimately not chosen because it could not be properly used as a verb in the context of an internet search; Webster commented "Oh, 'I banged it' is very different than [sic] 'I binged it'".[16]
Qi Lu, president of Microsoft Online Services, also announced that Bing's official Chinese name is bì yìng (simplified Chinese: 必应; traditional Chinese: 必應), which literally means "very certain to respond" or "very certain to answer" in Chinese.[17]
While being tested internally by Microsoft employees, Bing's codename was Kumo (くも),[18] which came from the Japanese word for spider (蜘蛛; くも, kumo) as well as cloud (雲; くも, kumo), referring to the manner in which search engines "spider" Internet resources to add them to their database, as well as cloud computing.
Deal with Yahoo!
[edit]On July 29, 2009, Microsoft and Yahoo! announced that they had made a ten-year deal in which the Yahoo! search engine would be replaced by Bing, retaining the Yahoo! user interface. Yahoo! got to keep 88% of the revenue from all search ad sales on its site for the first five years of the deal, and have the right to sell advertising on some Microsoft sites.[19][20] All Yahoo! Search global customers and partners made the transition by early 2012.[21]
Legal challenges
[edit]On July 31, 2009, The Laptop Company, Inc. stated in a press release that it would challenge Bing's trademark application, alleging that Bing may cause confusion in the marketplace as Bing and their product BongoBing both do online product search.[22] Software company TeraByte Unlimited, which has a product called BootIt Next Generation (abbreviated to BING), also contended the trademark application on similar grounds, as did a Missouri-based design company called Bing! Information Design.[23]
Microsoft contended that claims challenging its trademark were without merit because these companies filed for U.S. federal trademark applications only after Microsoft filed for the Bing trademark in March 2009.[24]
Growth (2009–2023)
[edit]In October 2011, Microsoft stated that they were working on new back-end search infrastructure with the goal of delivering faster and slightly more relevant search results for users. Known as "Tiger", the new index-serving technology had been incorporated into Bing globally since August that year.[25]
In May 2012, Microsoft announced another redesign of its search engine that includes "Sidebar", a social feature that searches users' social networks for information relevant to the search query.[26]
The BitFunnel search engine indexing algorithm and various components of the search engine were made open source by Microsoft in 2016.[27][28]
AI integration (2023–present)
[edit]On February 7, 2023, Microsoft began rolling out a major overhaul to Bing, called the new Bing. The new Bing included a new chatbot feature, at the time known as Bing Chat, based on OpenAI's GPT-4.[29] According to Microsoft, one million people joined its waitlist within a span of 48 hours.[30] Bing Chat was available only to users of Microsoft Edge and Bing mobile app, and Microsoft said that waitlisted users would be prioritized if they set Edge and Bing as their defaults, and installed the Bing mobile app.[31]
When Microsoft demoed Bing Chat to journalists, it produced several hallucinations, including when asked to summarize financial reports.[32] The new Bing was criticized in February 2023 for being more argumentative than ChatGPT, sometimes to an unintentionally humorous extent.[33][34] The chat interface proved vulnerable to prompt injection attacks with the bot revealing its hidden initial prompts and rules, including its internal codename "Sydney".[35] Upon scrutiny by journalists, Bing claimed it spied on Microsoft employees via laptop webcams and phones.[33] It confessed to spying on, falling in love with, and then murdering one of its developers at Microsoft to The Verge reviews editor Nathan Edwards.[36] The New York Times journalist Kevin Roose reported on strange behavior of Bing Chat, writing that "In a two-hour conversation with our columnist, Microsoft's new chatbot said it would like to be human, had a desire to be destructive and was in love with the person it was chatting with."[37] In a separate case, Bing researched publications of the person with whom it was chatting, claimed they represented an existential danger to it, and threatened to release damaging personal information in an effort to silence them.[38] Microsoft released a blog post stating that the errant behavior was caused by extended chat sessions of 15 or more questions which "can confuse the model on what questions it is answering."[39]
Microsoft later restricted the total number of chat turns to 5 per session and 50 per day per user (a turn is "a conversation exchange which contains both a user question and a reply from Bing"), and reduced the model's ability to express emotions. This aimed to prevent such incidents.[40][41] Microsoft began to slowly ease the conversation limits, eventually relaxing the restrictions to 30 turns per session and 300 sessions per day.[42]
In March 2023, Bing reached 100 million active users.[43]
That same month, Bing incorporated an AI image generator powered by OpenAI's DALL-E 2, which can be accessed either through the chat function or a standalone image-generating website.[44] In October, the image-generating tool was updated to the more recent DALL-E 3.[citation needed] Although Bing blocks prompts including various keywords that could generate inappropriate images, within days many users reported being able to bypass those constraints, such as to generate images of popular cartoon characters committing terrorist attacks.[45] Microsoft would respond to these shortly after by imposing a new, tighter filter on the tool.[46][47]
On May 4, 2023, Microsoft switched the chatbot from Limited Preview to Open Preview and eliminated the waitlist, however, it remained available only on Microsoft's Edge browser or Bing app until July, when it became available for use on non-Edge browsers.[48][49][50][51] Use is limited without a Microsoft account.[52]
On November 15, 2023, Microsoft announced that Bing Chat was to be merged into Microsoft Copilot.[53]
On 23 April 2024, Microsoft launched Phi-3-mini, a cost-effective AI model designed for simpler tasks.[54]
Features
[edit]Microsoft Copilot
[edit]Microsoft Copilot, formerly known as Bing Chat, is an chatbot developed by Microsoft and released in 2023. Copilot utilizes the Microsoft Prometheus model,[55] built upon OpenAI's GPT-4 foundational large language model,[56] which in turn has been fine-tuned using both supervised and reinforcement learning techniques. Copilot can serve as a chat tool, write different types of content from poems to songs to stories to reports, provide the user with information and insights on the website page open in the browser, and use its Microsoft Designer feature to design a logo, drawing, artwork, or other image based on text. Microsoft Designer supports over a hundred languages.[57]
Copilot can also cite its sources, similarly to Google's Bard after its Gemini integration,[58] xAI's Grok, and OpenAI's ChatGPT, which Copilot's conversational interface style appears to mimic. Copilot is capable of understanding and communicating in major languages including English, French, Italian, Chinese, Japanese, and Portuguese, but also dialects such as Bavarian. The chatbot is designed to function primarily in Microsoft Edge, Skype, or the Bing app, through a dedicated webpage or internally using built-in app features.[57]

Third-party integration
[edit]Facebook users have the option to share their searches with their Facebook friends using Facebook Connect.[59]
On June 10, 2013, Apple announced that it would be dropping Google as its web search engine in favor of Bing. This feature is only integrated with iOS 7 and higher and for users with an iPhone 4S or higher as the feature is only integrated with Siri, Apple's personal assistant.[60]
Integration with Windows 8.1
[edit]Windows 8.1 includes Bing "Smart Search" integration, which processes all queries submitted through the Windows Start Screen.[61]
Translator
[edit]Bing Translator is a user facing translation portal provided by Microsoft to translate texts or entire web pages into different languages. All translation pairs are powered by the Microsoft Translator, a statistical machine translation platform and web service, developed by Microsoft Research, as its backend translation software. Two transliteration pairs (between Chinese (Simplified) and Chinese (Traditional)) are provided by Microsoft's Windows International team.[62] As of September 2020, Bing Translator offers translations in 70 different language systems.[63]
Knowledge and Action Graph
[edit]In 2015 Microsoft announced its knowledge and action API to correspond with Google's Knowledge graph with 1 billion instances and 20 billion related facts.[64]
Bing Predicts
[edit]The idea for a prediction engine was suggested by Walter Sun, Development Manager for the Core Ranking team at Bing, when he noticed that school districts were more frequently searched before a major weather event in the area was forecasted, because searchers wanted to find out if a closing or delay was caused. He concluded that the time and location of major weather events could accurately be predicted without referring to a weather forecast by observing major increases in search frequency of school districts in the area. This inspired Bing to use its search data to infer outcomes of certain events, such as winners of reality shows.[65] Bing Predicts launched on April 21, 2014. The first reality shows to be featured on Bing Predicts were The Voice, American Idol, and Dancing with the Stars.[66]
The prediction accuracy for Bing Predicts is 80% for American Idol, and 85% for The Voice. Bing Predicts also predicts the outcomes of major political elections in the United States. Bing Predicts had 97% accuracy for the 2014 United States Senate elections, 96% accuracy for the 2014 United States House of Representatives elections, and an 89% accuracy for the 2014 United States gubernatorial elections. Bing Predicts also made predictions for the results of the 2016 United States presidential primaries.[67] It has also done predictions in sports, including a perfect 15 for 15 in the 2014 World Cup,[68][69] and an article on how Microsoft CEO Satya Nadella did well in his March Madness bracket entry.[70]
In 2016, Bing Predicts failed to predict the correct winner of the 2016 US presidential election, suggesting that Hillary Clinton would win by 81%.[71]
International
[edit]Bing is available in many languages and has been localized for many countries.[72] Even if the language of the search and of the results are the same, Bing delivers substantially different results for different parts of the world.[73]
Webmaster services
[edit]Bing allows webmasters to manage the web crawling status of their own websites through Bing Webmaster Center. Users may also submit contents to Bing via the Bing Local Listing Center, which allows businesses to add business listings onto Bing Maps and Bing Local.
Mobile services
[edit]Bing Mobile allows users to conduct search queries on their mobile devices, either via the mobile browser or a downloadable mobile application.
Bing News
[edit]Bing News (previously Live Search News)[74] is a news aggregator powered by artificial intelligence.[75]
In August 2015 Microsoft announced that Bing News for mobile devices added algorithmic-deduced "smart labels" that essentially act as topic tags, allowing users to click through and explore possible relationships between different news stories. The feature emerged as a result from Microsoft research that found out about 60% of the people consume news by only reading headlines, rather than read the articles.[76] Other labels that have been deployed since then include publisher logos[77] and fact-check tags.
Software
[edit]Toolbars
[edit]The Bing Bar, a browser extension toolbar that replaced the MSN Toolbar, provides users with links to Bing and MSN content from within their web browser without needing to navigate away from a web page they are already on. The user can customize the theme and color scheme of the Bing Bar and choose which MSN content buttons to display. Bing Bar also has the local weather forecast and stock market positions.[78]
The Bing Bar integrates with the Bing search engine. It allows searches on other Bing services such as Images, Video, News and Maps. When users perform a search on a different search engine, the Bing Bar's search box automatically populates itself, allowing the user to view the results from Bing, should it be desired.
Bing Bar also links to Outlook.com, Skype and Facebook.[79]
Desktop
[edit]
Microsoft released a beta version of Bing Desktop, a program developed to allow users to search Bing from the desktop, on April 4, 2012.[80] The production release followed on April 24, supporting Windows 7 only.[81] Upon the release of version 1.1 in December 2012 it supported Windows XP and higher.[82]
Bing Desktop allows users to initiate a web search from the desktop, view news headlines, automatically set their background to the Bing homepage image, or choose a background from the previous nine background images.[83]

A similar program, the Bing Search gadget, was a Windows Sidebar Gadget that used Bing to fetch the user's search results and render them directly in the gadget. Another gadget, the Bing Maps gadget, displayed real-time traffic conditions using Bing Maps.[84] The gadget provided shortcuts to driving directions, local search and full-screen traffic view of major US and Canadian cities, including Atlanta, Boston, Chicago, Denver, Detroit, Houston, Los Angeles, Milwaukee, Montreal, New York City, Oklahoma City, Ottawa, Philadelphia, Phoenix, Pittsburgh, Portland, Providence, Sacramento, Salt Lake City, San Diego, San Francisco, Seattle, St. Louis, Tampa, Toronto, Vancouver, and Washington, D.C.
Prior to October 30, 2007, the gadgets were known as Live Search gadget and Live Search Maps gadget; both gadgets were removed from Windows Live Gallery due to possible security concerns.[85] The Live Search Maps gadget was made available for download again on January 24, 2008 with the security concern addressed.[86] However, around the introduction of Bing in June 2009 both gadgets were removed again.
Marketing
[edit]Debut
[edit]Bing's debut featured an $80 to $100 million online, TV, print, and radio advertising campaign in the US. The advertisements did not mention other search engine competitors, such as Google and Yahoo!, directly by name; rather, they tried to convince users to switch to Bing by focusing on Bing's search features and functionality.[87] The ads claimed that Bing does a better job countering "search overload".[88]
Market share
[edit]Before the launch of Bing, the market share of Microsoft web search pages (MSN and Live search) had been small. By January 2011, Experian Hitwise showed that Bing's market share had increased to 12.8% at the expense of Yahoo! and Google. In the same period, Comscore's "2010 U.S. Digital Year in Review" report showed that "Bing was the big gainer in year-over-year search activity, picking up 29% more searches in 2010 than it did in 2009".[89] The Wall Street Journal noted the jump in share "appeared to come at the expense of rival Google Inc".[90] In February 2011, Bing beat Yahoo! for the first time with 4.37% search share while Yahoo! received 3.93%.[91]
Counting core searches only, i.e., those where the user has an intent to interact with the search result, Bing had a market share of 14.54% in the second quarter of 2011 in the United States.[59][92][93][94]
The combined "Bing Powered" U.S. searches declined from 26.5% in 2011 to 25.9% in April 2012.[95] By November 2015, its market share had declined further to 20.9%.[96] As of October 2018, Bing was the third-largest search engine in the US, with a query volume of 4.58%, behind Google (77%) and Baidu (14.45%). Yahoo! Search, which Bing largely powers, has 2.63%.
UK advertising agencies in 2018 pointed to a study by a Microsoft Regional Sales Director suggesting the demographic of Bing users is older people (who are less likely to change the default browser of Windows), and that this audience is wealthier and more likely to respond to advertisements.[97]
To counter EU accusations that it was trying to establish a market monopoly, in September 2021 Google's lawyers claimed that one of the most commonly searched words on Microsoft Bing was Google, which is a strong indication that Google is superior to Bing.[98][99]
In 2025, Bing was reported as growing its market share, growing from 7.2% to 7.9% from August 2020 to August 2025.[100]
Search partners
[edit]In July 2009, Microsoft and Yahoo! announced a deal in which Bing would power Yahoo! Search.[101] All Yahoo! Search global customers and partners made the transition by early 2012.[21] The deal was altered in 2015, meaning Yahoo! was only required to use Bing for a "majority" of searches.[102]
DuckDuckGo has used multiple sources for its search engine, including Bing, since 2010.[103][104][105]
Ecosia uses Bing to provide its search results as of 2017.[106]
Bing was added into the list of search engines available in Opera browser from v10.6, but Google remained the default search engine.[107]
Mozilla Firefox made a deal with Microsoft to jointly release "Firefox with Bing",[108] an edition of Firefox using Bing instead of Google as the default search engine.[109][110] The standard edition of Firefox has Google as its default search engine, but has included Bing as an option since Firefox 4.0.[111]
In 2009 Microsoft paid Verizon Wireless US$550 million[112] to use Bing as the default search provider on Verizon's BlackBerry and have the others "turned off". Users could still access other search engines via the mobile browser.[113]
Live Search
[edit]Since 2006, Microsoft had conducted tie-ins and promotions to promote Microsoft's search offerings. These included:
- Amazon's A9 search service and the experimental Ms. Dewey interactive search site syndicated all search results from Microsoft's then search engine, Live Search. This tie-in started on May 1, 2006.
- Search and Give – a promotional website launched on January 17, 2007 where all searches done from a special portal site would lead to a donation to the UNHCR's organization for refugee children, ninemillion.org. Reuters AlertNet reported in 2007 that the amount to be donated would be $0.01 per search, with a minimum of $100,000 and a maximum of $250,000 (equivalent to 25 million searches).[114] According to the website, the service was decommissioned on June 1, 2009, having donated over $500,000 to charity and schools.[115]
- Club Bing – a promotional website where users can win prizes by playing word games that generate search queries on Microsoft's then search service Live Search. This website began in April 2007 as Live Search Club.
- Big Snap Search – a promotional website similar to Live Search Club. This website began in February 2008, but was discontinued shortly after.[116]
- Live Search SearchPerks! — a promotional website which allowed users to redeem tickets for prizes while using Microsoft's search engine. This website began on October 1, 2008 and was decommissioned on April 15, 2009.
"Decision engine"
[edit]Bing has been heavily advertised as a "decision engine",[117] though thought by columnist David Berkowitz to be more closely related to a web portal.[118]
Microsoft Rewards
[edit]Bing Rewards was a loyalty program launched by Microsoft in September 2010. It was similar to two earlier services, SearchPerks! and Bing Cashback, which were subsequently discontinued.
Bing Rewards provided credits to users through regular Bing searches and special promotions.[119] These credits were then redeemed for various products including electronics, gift cards, sweepstakes, and charitable donations.[120] Initially, participants were required to download and use the Bing Bar for Internet Explorer in order to earn credits; but later the service was made to work with all desktop browsers.[121]
The Bing Rewards program was rebranded as "Microsoft Rewards" in 2016,[122] at which point it was modified to only two levels, Level 1 and Level 2. Level 1 is similar to "Member", and Level 2 is similar to "Gold" of the previous Bing Rewards.
The Colbert Report
[edit]During the episode of The Colbert Report that aired on June 8, 2010, Stephen Colbert stated that Microsoft would donate $2,500 to help clean up the Gulf oil spill each time he mentioned the word "Bing" on air. Colbert mostly mentioned Bing in out-of-context situations, such as Bing Crosby and Bing cherries. By the end of the show, Colbert had said the word 40 times, for a total donation of $100,000. Colbert poked fun at their rivalry with Google, stating "Bing is a great website for doing Internet searches. I know that, because I Googled it."[123][124]
Bing It On
[edit]In 2012, a Bing marketing campaign asked the public which search engine they believed was better when its results were presented unbranded, similar to the Pepsi Challenge in the 1970s.[125][126] This poll was nicknamed "Bing It On".[127][128] Microsoft's study of almost 1,000 people[129] showed that 57% of participants preferred Bing's results, with only 30% preferring Google.[130]
Potential sale
[edit]CNBC reported in February 2024 that a legal filing from Google in its antitrust case said Microsoft offered to sell the search engine to Apple in 2018.[131] This came after earlier reporting in September 2023 from Bloomberg that Microsoft discussed selling it to Apple in 2020.[132]
The CNBC article also stated Apple said no to repeated attempts to make Bing the default search engine on its devices.
Adult content
[edit]Bing censors results for "adult" search terms for some regions, including India, People's Republic of China, Germany and Arab countries[133][failed verification] where required by local laws.[134] However, Bing allows users to change their country or region preference to somewhere without restrictions, such as the United States, United Kingdom or Republic of Ireland.

Criticism
[edit]Censorship in China
[edit]Microsoft has been criticized for censoring Bing search results to queries made in simplified Chinese characters which are used in mainland China. This is done to comply with the censorship requirements of the government in China.[135] Microsoft has not indicated a willingness to stop censoring search results in simplified Chinese characters in the wake of Google's decision to do so.[136] All simplified Chinese searches in Bing are censored regardless of the user's country.[137][138] The English-language search results of Bing in China has been skewed to show more content from state-run media like Xinhua News Agency and China Daily.[139] On 23 January 2019, Bing was blocked in China.[140] According to a source quoted by The Financial Times, the order was from the Chinese government to block Bing for "illegal content".[141] On 24 January, Bing was accessible again in China.[142]
Around 4 June 2021, the anniversary of the 1989 Tiananmen Square protests and massacre, Bing blocked image and video search results for the English term "Tank Man" in the US, UK, France, Germany, Singapore, Switzerland, and other countries. Microsoft responded that "This is due to an accidental human error".[143][144] According to an investigation by Bloomberg Businessweek, the full explanation was that Microsoft accidentally applied its Chinese blacklist globally.[145]
In December 2021, it was required by a "relevant government agency" to suspend its auto-suggest function in China for 30 days.[146] The search engine became partially unavailable in mainland China from 16 December until its resumption on 18 December 2021.[147][148] According to the company, a government agency in March 2022 required that it suspend auto-suggest function in China for seven days; Bing did not specify the reason.[149] In May 2022, a report released by the Citizen Lab of the University of Toronto found that Bing's autosuggestion system censored the names of Chinese Communist Party leaders, dissidents, and other persons considered politically sensitive in China in both Chinese and English, not only in China but also in the United States and Canada.[150][151]
In April 2023, Citizen Lab reported that Bing was more censorious in China than native Chinese search engines.[152][153]
Copyright-infringing content
[edit]On February 20, 2017, Bing agreed to a voluntary United Kingdom code of practice obligating it to demote links to copyright-infringing content in its search results.[154][155]
Performance issues
[edit]Bing was criticized in 2010 for being slower to index websites than Google. It was also criticized for not indexing some websites at all.[156][157]
Alleged copying of Google results
[edit]Bing has been criticized by competitor Google for utilizing user input via Internet Explorer, the Bing Toolbar, or Suggested Sites, to add results to Bing. After discovering in October 2010 that Bing appeared to be imitating Google's auto-correct results for a misspelling, despite not actually fixing the spelling of the term, Google set up a honeypot, configuring the Google search engine to return specific unrelated results for 100 nonsensical queries such as hiybbprqag.[158] Over the next couple of weeks, Google engineers entered the search term into Google, while using Microsoft Internet Explorer, with the Bing Toolbar installed and the optional Suggested Sites enabled. In 9 out of the 100 queries, Bing later started returning the same results as Google, despite the only apparent connection between the result and search term being that Google's results connected the two.[159][160]
Microsoft's response to this issue, coming from a company spokesperson, was: "We do not copy Google's results." Bing's Vice President, Harry Shum, later reiterated that the search result data Google claimed that Bing copied had in fact come from Bing's very own users. Shum wrote that "we use over 1,000 different signals and features in our ranking algorithm. A small piece of that is clickstream data we get from some of our customers, who opt into sharing anonymous data as they navigate the web in order to help us improve the experience for all users." [161] Microsoft stated that Bing was not intended to be a duplicate of any existing search engines.[162]
Child pornography
[edit]A study released in 2019 of Bing Image search showed that it both freely offered up images that had been tagged as illegal child pornography in national databases, as well as automatically suggesting via its auto-completion feature queries related to child pornography. This easy accessibility was considered particularly surprising since Microsoft pioneered PhotoDNA, the main technology used for tracking images reported as originating from child pornography.[163] Additionally, some arrested child pornographers reported using Bing as their main search engine for new content.[164] Microsoft vowed to fix the problem and assign additional staff to combat the issue after the report was released.
Privacy
[edit]In 2022, France imposed a €60 million fine on Microsoft for privacy law violations using Bing cookies that prevented users from rejecting those cookies.[165][166][167]
Malware
[edit]In 2024, malware was found in the official Bing Wallpaper app that tries to change the users' browser settings in order to set the default web browser to Microsoft Edge. It has also been found stealing Edge, Chrome, and Firefox cookies.[168]
See also
[edit]Notes
[edit]- ^ Bing for Windows Search in taskbar
References
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Further reading
[edit]- "Transforming Search from Finding to Doing (Press Release)". Microsoft. Archived from the original on May 18, 2012. Retrieved May 17, 2012.
External links
[edit]
Media related to Bing at Wikimedia Commons
Microsoft Bing
View on GrokipediaHistory
Predecessors and Development (1998–2008)
Microsoft launched MSN Search in the third quarter of 1998 as its initial web search service, initially relying on indexing technology from third-party provider Inktomi rather than developing a proprietary web crawler or index from inception.[12] This dependence highlighted early limitations in Microsoft's search capabilities, as the service functioned primarily as a frontend to external results amid rising competition from emerging engines like Google.[13] By 2004, Microsoft began investing heavily in in-house development, culminating in February 2005 with the release of a ground-up built search engine featuring proprietary algorithms for more precise results and faster response times.[14] To bolster revenue, Microsoft introduced adCenter in 2005, a paid search platform integrated with MSN Search to compete in the growing advertising market dominated by Google's AdWords.[15] These efforts addressed causal factors such as Google's algorithmic superiority and market share gains, which by the mid-2000s had eroded Microsoft's position despite its dominance in desktop operating systems.[16] Initial vertical search features for news and images were added, but overall market share hovered below 5% globally, reflecting persistent challenges in user relevance and adoption.[17] In March 2006, Microsoft unveiled the public beta of Windows Live Search, emphasizing enhanced user interface, organizational tools, and expanded categories including local and image search, with the full version replacing MSN Search on September 11, 2006.[18] This iteration marked a shift toward a unified platform under the Windows Live branding, incorporating deeper integration with Microsoft services like MSN Shopping.[19] By 2007, rebranded as Live Search, it received significant updates including a fourfold index expansion, improved query intent understanding, and algorithmic enhancements for relevance, driven by the need to counter Google's dominance.[20] These developments laid the technical groundwork for future consolidation, though empirical data showed market share stabilizing around 3% worldwide by late 2008.[17]Launch and Rebranding (2009)
Microsoft CEO Steve Ballmer announced Bing on May 28, 2009, at the All Things Digital conference, rebranding the company's Live Search service to emphasize its role as a "decision engine" designed to facilitate informed choices in areas such as shopping, travel, and health rather than merely aggregating links.[21][22] The service became available at bing.com immediately, with a full worldwide rollout completed by June 3, 2009.[21] Microsoft committed $80 million to $100 million to a marketing campaign highlighting Bing's differentiation from competitors like Google.[23][24] Bing's launch incorporated technical enhancements to boost result relevance, including entity extraction, query intent recognition, and document summarization powered by upgraded statistical ranking models such as RankNet.[21][25] User interface improvements featured "Preview" hover-over summaries, "Best Match" prioritization, Quick Tabs for categorized vertical searches, and an Explore Pane for related content, aiming to reduce the 30% search abandonment rate identified in comScore studies.[21] On July 29, 2009, Microsoft and Yahoo announced a 10-year search alliance, with Bing providing core algorithmic and paid search technology for Yahoo sites while Yahoo handled premium ad sales and retained UI control, entitling Yahoo to 88% of revenue from its owned properties for the first five years.[26] The deal was projected to elevate Microsoft's international query volume substantially upon implementation within 24 months, pending approvals.[26] It prompted antitrust reviews, including informal EU discussions starting in September 2009, ultimately cleared in February 2010 without conditions altering the agreement.[27][28] Empirical data indicated an initial U.S. market share surge to 11.1% for the week of June 2–6, 2009, per comScore, reflecting marketing-driven curiosity.[29][30] However, subsequent user studies revealed preferences for Bing's design over Google's but equivalence or shortfalls in perceived relevance, contributing to limited retention beyond the hype-fueled spike and stabilization around 9–10% by late 2009.[31][32]Growth and Partnerships (2010–2022)
In February 2010, Microsoft implemented its search alliance with Yahoo, transitioning Yahoo's algorithmic and paid search platforms to Bing technology, which expanded Bing's query volume and ad inventory without requiring users to switch engines.[33] This syndication deal, originally agreed in 2009, allowed Microsoft to leverage Yahoo's traffic for revenue sharing while providing Yahoo with Bing's backend improvements, contributing to Bing's early scale against Google's dominance.[34] A strategic partnership with Nokia, announced on February 10, 2011, positioned Bing as the default search provider across Nokia devices and services, integrating Bing's capabilities with Nokia Maps for location-based queries.[35] This alliance aimed to challenge iOS and Android ecosystems by bundling Windows Phone with Nokia hardware, though it faced execution hurdles following Microsoft's 2014 acquisition of Nokia's devices business; nonetheless, it temporarily boosted Bing's mobile visibility.[36] Bing's designation as the default search engine in Internet Explorer 9 (released March 2011) and subsequent versions reinforced its position within Microsoft's ecosystem, driving organic usage among Windows users without coercive bundling tactics reminiscent of prior antitrust issues.[37] These integrations correlated with incremental market share gains, as U.S. desktop search share rose from under 10% in 2010 to approximately 15% by 2020, per traffic analytics, while global share stabilized at 3-4% amid Google's entrenchment.[6] To support expansion, Microsoft invested in infrastructure, including datacenter buildouts in the early 2010s to handle Bing's indexing demands alongside Azure growth; by 2013, accelerated expansions added capacity for search workloads, enabling features like real-time query processing.[38] Software advancements included Satori, Bing's entity-focused knowledge system launched in March 2013, which enhanced result relevance by extracting structured data from queries, powered by over 50,000 compute nodes.[39][40] Search advertising revenue, primarily from Bing-powered properties, grew to an estimated $6.24 billion in net terms by 2022, reflecting synergies with enterprise tools like Azure for business search integrations.[2] Partnerships emphasized pro-competitive openness, such as allowing syndication to rivals, which Microsoft defended against echoes of past browser-era scrutiny by highlighting user choice and innovation over exclusionary practices.[41] This trajectory underscored Bing's reliance on ecosystem leverage rather than standalone disruption, with strengths in desktop and enterprise segments offsetting mobile weaknesses.AI Integration and Modern Era (2023–present)
Microsoft's integration of AI into Bing originated from its 2019 partnership with OpenAI, which included a $1 billion investment and exclusive hosting of OpenAI's models on Azure, later expanding through multi-billion dollar commitments to develop advanced AI technologies.[42] In February 2023, Microsoft launched an AI-powered version of Bing, introducing Bing Chat as a conversational search feature powered by the Prometheus model, which integrates OpenAI's GPT-4 large language model with Bing's search index and ranking systems to generate responses grounded in real-time web data.[43][44] This differed from OpenAI's ChatGPT, launched in November 2022 on GPT-3.5 as a general consumer chatbot, by embedding OpenAI technology into Microsoft's ecosystem for productivity enhancements, enterprise security, and app-specific integrations.[45] The initial rollout was limited to preview users, scaling to millions amid high demand, but Microsoft imposed query caps—such as 50 chat turns per day and five per session—to manage computational constraints and mitigate early response inaccuracies.[46] In March 2023, Microsoft announced a preview of Microsoft 365 Copilot, extending these capabilities to productivity applications.[47] By March 2023, Bing's daily active users surpassed 100 million, reflecting a one-third increase attributed to the AI integration.[48] Bing Chat was rebranded as Copilot in November 2023, unifying it under Microsoft's broader AI branding while expanding capabilities like multimodal visual search, which allows users to query via combined text and images for more contextual results, rolled out in mid-2023.[49] Copilot has since progressed to incorporate advanced OpenAI models including GPT-4o, o1, GPT-5, and by early 2026 GPT-5.2, with updates enabling agent features in Microsoft 365 applications.[50] In October 2025, the Microsoft-OpenAI partnership was redefined to facilitate OpenAI's transition to a public benefit corporation structure while maintaining Microsoft's exclusive access to frontier models until AGI achievement; Microsoft introduced options for Anthropic models but retained primary reliance on OpenAI's latest offerings for Copilot.[51] Subsequent updates through 2024 and 2025 deepened Copilot's embedding in Bing, enabling AI-driven "fewer-click" searches that synthesize answers from multiple sources, reducing user navigation steps as highlighted in Microsoft's internal analyses of search behavior shifts.[52] Enterprise tools, such as Copilot for secure, organization-specific queries, were introduced to address business needs, alongside ongoing refinements to reduce factual errors through techniques like source verification and iterative querying.[53] These enhancements contributed to search and news advertising revenue growth of approximately 21% year-over-year in fiscal 2025, reaching $13.9 billion in a key quarter, driven by improved ad relevance in AI-generated responses.[54] Empirical market data as of September 2025 shows Bing holding about 17% of the U.S. desktop search share, up modestly from pre-AI levels, while global share remains around 4%, indicating limited displacement of dominant competitors despite innovations.[6][55] This persistence aligns with structural barriers, though U.S. Department of Justice antitrust rulings against Google in 2024–2025, prohibiting exclusive default search deals on devices and browsers, have causally boosted Bing's visibility by prompting device makers and carriers to consider alternatives, potentially accelerating adoption.[56][57] Overall, AI integration has enhanced Bing's utility for complex queries but has not yet translated to proportional market dominance, underscoring the role of entrenched distribution in search economics.[2]Technical Architecture
Core Search Engine Mechanics
Bing's core search engine mechanics initiate with web crawling performed by proprietary bots called Bingbots, which discover and fetch content by traversing hyperlinks from seeded URLs and prioritizing based on signals like site authority and update recency. The process extracts textual, structural, and metadata elements from pages, often rendering dynamic content via headless browsers integrated into a prioritized crawl queue to handle JavaScript-heavy sites efficiently. This systematic discovery ensures comprehensive coverage of the publicly accessible web, with algorithmic adjustments to crawl frequency that reduce redundancy for stable pages while increasing it for frequently updated ones, thereby optimizing resource allocation causally tied to content volatility patterns.[58][59][60] Extracted data undergoes processing for indexing, where content is parsed, tokenized, and organized into inverted structures mapping terms to document locations for rapid retrieval, emphasizing freshness through protocols like IndexNow that enable direct URL submissions for near-instant crawling and incorporation into the index, bypassing delays in traditional link-based discovery. This indexing maintains a dynamic repository updated in real-time for time-sensitive content, with empirical prioritization ensuring causal links between crawl efficiency and result timeliness, as slower updates would degrade relevance for queries on breaking events.[61][62] Query handling commences with natural language processing to interpret user intent, applying pre-AI linguistic models for entity recognition, synonym expansion, and ambiguity resolution without generative synthesis. Relevant candidates are pulled from the index via vector-based matching and scoring on term proximity, after which ranking employs machine learning frameworks like RankNet derivatives—a pairwise probabilistic model developed by Microsoft researchers in 2005 using gradient descent to learn preferences between document pairs from labeled relevance data and implicit user signals such as click-through rates. This optimizes a global loss function over features including textual overlap, authority metrics, and load times, yielding a sorted list where higher scores reflect empirically stronger causal relevance to the query.[63][64][65] Scalability underpins these mechanics through integration with Azure's distributed cloud infrastructure, which partitions indexing and query workloads across elastic compute clusters to manage peak demands, as evidenced by 2019 GPU accelerations that processed enhancements at global scale without proportional latency increases. This architecture causally enables handling of high-volume queries by dynamically allocating resources, preventing bottlenecks that would otherwise arise from monolithic servers, with redundancy ensuring fault tolerance during surges.[66]Indexing and Ranking Algorithms
Bing's indexing process utilizes inverted index structures that map search terms to the documents containing them, facilitating rapid retrieval across billions of web pages. These structures are optimized for query speed through sharding, distributing index segments across multiple datacenters to manage scale and reduce latency during parallel processing.[67][68] To enhance efficiency, Bing incorporates compressed representations like bit-sliced signatures in its BitFunnel index, which supports both indexing and initial ranking stages with reduced memory footprint while maintaining retrieval accuracy.[69] Document freshness is maintained via continuous crawling and prioritization metrics that favor recently updated pages, ensuring search results reflect current web content over static historical data.[64] Empirical comparisons indicate Bing's index updates less frequently than competitors like Google, with estimates placing Bing's indexed corpus at 8 to 14 billion pages versus Google's larger scale, though Bing demonstrates strengths in indexing certain multimedia and structured content categories.[70][71] For ranking, Bing applies learning-to-rank models akin to LambdaMART, which optimize document scores by combining hundreds of features—including term proximity, page authority, and entity salience—through gradient-boosted decision trees trained on relevance judgments.[72] These models integrate user interaction signals post-initial ranking, such as click-through rates and dwell time, to refine personalization and relevance, with Bing placing comparatively higher emphasis on exact-match keywords and domain trust metrics than probabilistic intent modeling in rivals.[73][74] Anti-spam mechanisms enforce webmaster guidelines that detect link farms and content manipulation, demoting or excluding low-quality pages to preserve result integrity, as outlined in Bing's systemic risk assessments.[75]Knowledge Graph and Semantic Processing
Bing's knowledge graph, powered by the Satori entity extraction and resolution system, processes structured data to represent real-world entities and their interconnections, enabling contextual query understanding beyond keyword matching. Introduced in an upgrade on March 21, 2013, Satori identifies and disambiguates entities such as people, places, and objects by mapping ambiguous query terms to unique nodes in the graph, drawing from public structured sources including Wikipedia infoboxes and the Freebase knowledge base.[39][76] This entity resolution fundamentally addresses causal limitations in string-based matching, where homonyms or polysemous terms degrade precision and recall; by resolving to canonical entities, Satori ensures queries align with intended referents, as evidenced by its deployment in snapshot panels delivering entity-specific summaries.[77] The graph's semantic processing supports vertical-specific enhancements, such as facet-based filtering by entity attributes (e.g., location or category) and generation of related entity suggestions, which expand query scope through inferred relationships like co-occurrence or hierarchical links. Pre-AI implementations relied on this entity-centric ranking to prioritize results matching graph-derived semantics over lexical similarity alone, improving retrieval in domains like biographies or geography where entity context drives relevance.[78] Empirical benchmarks of similar entity-augmented systems demonstrate gains in recall by resolving textual ambiguities that pure indexing misses, though Bing-specific internal metrics remain proprietary.[77] Complementing the core knowledge graph, Bing integrates an Action Graph extension, accessible via API since August 20, 2015, to model user intents through action-oriented nodes linking entities to executable tasks or states. This structure predicts query purposes—such as navigational or transactional—by traversing paths from entities to potential actions, facilitating intent-aware result presentation without generative synthesis. In decision-oriented queries, the Action Graph's relational depth empirically supports deeper exploration over superficial summaries, as entity-action linkages guide users toward linked resources rather than isolated facts.[79][80] Overall, these components underscore knowledge representation's role in causal search accuracy, prioritizing verifiable entity linkages over probabilistic keyword associations.[81]Features
Traditional Search Functions
Bing's traditional web search processes textual queries to retrieve and rank relevant web pages, presenting results in a list format that includes page titles, URLs, and snippets—concise excerpts from the content highlighting query matches.[64] This core mechanism emphasizes keyword relevance, with algorithmic ranking influenced by factors such as page authority and freshness, though exact details remain proprietary.[62] The engine generates related searches and query suggestions to refine user intent, aiding in exploration of variations or subtopics without additional input.[70] SafeSearch filters constitute a key control, allowing users to apply Strict, Moderate, or Off settings to exclude adult content from results, with Strict mode blocking explicit sites, images, and videos by default in certain configurations like educational environments.[82][83] In 2025, Bing handles over 900 million searches daily worldwide, reflecting its position as the second-largest search engine with approximately 4% global market share.[84] It demonstrates strengths in local and business listings, often surfacing results from a broader geographic radius than competitors, which can yield more comprehensive options for users not strictly tied to hyper-local proximity.[85][86] Personalization features, such as tailoring results to past searches or location, require signing in with a Microsoft account and are disabled by default for unsigned-in sessions, aligning with an opt-in approach that limits data collection unless explicitly enabled.[87] This setup provides baseline privacy, as non-personalized searches rely on general relevance signals rather than user-specific history.[88]Multimedia and Specialized Search
Bing's image search utilizes Visual Search technology to enable reverse image queries, where users upload photos or provide URLs to retrieve visually similar images, identify objects, landmarks, or products, and explore related content such as shopping options or textual extractions from visuals.[89][90] This approach leverages computer vision algorithms to analyze image content beyond textual metadata, facilitating precise matches based on aesthetic and structural similarities rather than keyword reliance alone.[91] Video search in Bing emphasizes indexed previews and embedded playback, allowing users to scan thumbnails, filter by length, upload date, source, and quality, which supports efficient discovery of relevant footage without full downloads.[92] These features draw on comprehensive video cataloging, including transcript integration where available from source metadata, to enhance searchability through temporal and semantic cues.[93] News aggregation provides real-time feeds curated from thousands of publishers, with algorithmic prioritization of breaking stories and integration of Twitter updates for immediacy.[94] To address misinformation, Bing appends fact-check labels to results, sourcing verifications from independent outlets like Snopes and Politifact, though the efficacy depends on the timeliness and scope of these partnerships.[95][96] Specialized verticals include shopping search, which compiles product listings, price comparisons, and deal alerts across retailers, and academic tools that prioritize peer-reviewed papers, educational resources, and scientific summaries via metadata-enriched indexing.[4][97][98] Bing's architecture excels in multimedia domains by extracting embedded metadata—such as EXIF data for images and subtitles for videos—yielding higher precision in non-textual retrievals than in broad web indexing, as evidenced by its emphasis on rich media optimization for relevance.[99][73]AI-Enhanced Capabilities
Microsoft Bing integrates generative AI through Copilot, a conversational interface that processes natural language queries by combining large language models from OpenAI with real-time web search results to generate synthesized responses accompanied by source citations.[100] This enables multi-turn dialogues where users refine queries iteratively, differing from traditional keyword-based retrieval by prioritizing contextual understanding and explanatory outputs.[101] In 2025, Copilot expanded to support multimodal inputs, accepting text, voice, and images to handle diverse query types such as visual analysis or combined media descriptions, alongside streamlined response pathways that summarize conversation histories for efficiency.[102] User studies indicate higher satisfaction with Copilot for complex, multi-step queries compared to standard search, as the AI's explanatory capabilities aid in tasks requiring synthesis, with regression analyses showing satisfaction increasing with task complexity.[101] However, outputs occasionally include inaccuracies or "hallucinations"—fabricated details arising from model limitations—prompting criticisms of reliability in sensitive domains like medical advice, where error rates could reach 22% in tested scenarios.[103] [104] Microsoft has implemented mitigations such as retrieval-augmented generation, where responses are grounded in verified web snippets, and iterative prompting to correct errors during conversations, reducing hallucination frequency over time.[105] Independent evaluations highlight persistent challenges, including potential biases in training data leading to evasive or skewed answers on controversial topics, though these are addressed through metaprompts enforcing factual sourcing.[106] These AI enhancements contributed to Bing's market share growth, with global desktop usage rising from under 4% in 2023 to approximately 12% by mid-2025, and U.S. share reaching 29% per some metrics, partly attributed to AI-driven user retention amid competition with Google.[107] [108]Integrations and Platforms
Microsoft Ecosystem Embeddings
Bing serves as the default search engine in Microsoft Edge, the proprietary browser bundled with Windows operating systems, directing address bar queries to Bing results unless users manually configure alternatives through Edge settings under "Privacy, search, and services."[109] This integration extends to Windows Search, where taskbar and Start menu queries incorporate Bing-powered web results, a feature inherited from Cortana's reliance on Bing in Windows 10 and persisting in modified form in Windows 11 despite Cortana's de-emphasis.[110] Users can disable web integration via system settings to limit searches to local files, though defaults facilitate seamless ecosystem query routing.[111] In Microsoft 365 applications, Bing underpins hybrid search capabilities, blending internal enterprise data with external web results to enhance productivity; for instance, Microsoft Search leverages Bing's indexing for contextual answers in Outlook, Teams, and SharePoint.[112] Copilot, Microsoft's AI assistant embedded in Office apps, draws on Bing's search infrastructure for generating responses and sourcing information, enabling features like summarized web insights within documents.[113] Enterprise deployments report efficiency gains from this fusion, such as faster information retrieval in hybrid work environments, though Microsoft retired dedicated "Microsoft Search in Bing" for work/school accounts on March 31, 2025, shifting emphasis to integrated Copilot experiences.[83] These embeddings contribute to observable increases in Bing query volume, with defaults in Edge and Windows accounting for approximately 80% of Bing's desktop search traffic as of 2025, amplifying usage through habitual OS interactions rather than standalone appeal.[114] Critics argue such defaults border on coercive bundling, citing instances of Edge reverting search preferences to Bing and Windows prioritizing online results, which can frustrate local-only searches.[115] However, opt-out mechanisms exist, including registry edits or settings toggles to exclude Bing web searches and select alternative engines, aligning with Microsoft's compliance to EU antitrust precedents that mandate choice in defaults post-2009 browser ballot rulings.[116] While recent EU scrutiny focused on Teams bundling rather than Bing directly, Microsoft has avoided fines by offering unbundled options and transparent configurations, ensuring users can evade ecosystem lock-in without technical barriers.[117]Mobile and Third-Party Access
The Microsoft Bing mobile application, available on iOS and Android platforms, provides users with access to core search functionalities including web queries, image and video searches, and AI-enhanced Copilot interactions for conversational results.[118][119] Launched in its modern form around 2014 and updated with features like chat integration by February 2023, the app supports voice-activated searches and real-time suggestions, enabling mobile users outside the Microsoft ecosystem to leverage Bing's indexing without desktop dependency.[120] As of 2025, it maintains high user ratings—4.7 on the iOS App Store from over 273,000 reviews and 4.5 on Google Play from 1.5 million reviews—reflecting adoption for on-the-go searches independent of Microsoft hardware.[118][119] Bing's developer APIs have facilitated third-party access by allowing integration of search results into non-Microsoft applications, with endpoints for web, news, images, videos, and custom searches that process queries programmatically.[121][122] These tools, part of Azure Cognitive Services, enabled empirical growth in external adoption, such as embedding Bing-powered results in apps for multimedia retrieval or spell-checked suggestions, with usage tracked via transaction-based pricing up to millions of calls monthly.[123] However, Microsoft announced on May 16, 2025, the full retirement of Bing Search APIs effective August 11, 2025, decommissioning existing instances and redirecting developers to AI-focused alternatives like summarization endpoints, citing a strategic pivot to prioritize proprietary AI enhancements over raw index access.[124][125][126] Third-party syndication has extended Bing's reach through partnerships, notably powering a significant portion of DuckDuckGo's results, which processed 112 billion cumulative queries by early 2025, including over 35 billion in 2021 alone, with Bing supplying the underlying index for non-instant answer responses.[127][128] Pre-2025 agreements allowed such resellers limited query volumes without full API exposure, fostering adoption in privacy-focused engines like DuckDuckGo, which directed ads back to Microsoft networks.[129] The 2025 API changes impose restrictions on rivals using Bing data to train or power competing AI models, framed by Microsoft as contractual enforcement to protect its index from unauthorized enhancement of alternatives, though large partners like DuckDuckGo reported negligible disruption due to grandfathered syndication deals.[125][130][131] This shift minimally impacts established syndicators while curtailing smaller developers, aligning with Microsoft's business focus on internal AI monetization over broad data distribution.[132]International and Regional Adaptations
Microsoft Bing operates globally, with localized versions tailored to specific regions through dedicated country-code top-level domain variants such as bing.co.uk for the United Kingdom and bing.de for Germany, enabling region-specific search experiences that prioritize local content and compliance with jurisdictional requirements.[4] These adaptations include customized indexing that favors geographically relevant results, supported by Microsoft's international data centers to reduce latency in regions like Europe and Asia.[66] In terms of market penetration, Bing exhibits varying adoption rates across countries, achieving approximately 18% share in Belgium as of 2024—significantly higher than its global average of around 4%—often bolstered by default integrations in devices and partnerships rather than organic preference.[133][5] Similar elevations occur in select European markets through syndication deals, contrasting lower traction in Asia where local engines dominate.[134] For pragmatic expansion into China, Microsoft established a partnership with Baidu in 2011, wherein Bing powered English-language search results on Baidu's platform to leverage the latter's dominant position in the Chinese market without directly competing on censored local queries.[135] This arrangement facilitated initial access to China's vast user base, with Bing handling non-Chinese queries to align with regulatory and linguistic divides.[136] Bing Webmaster Tools further aids international optimization by providing country-specific performance filters, introduced in August 2025, allowing site owners to analyze search data by geography, device, and trends over 24 months to refine global SEO strategies.[137] These tools emphasize verifiable metrics for cross-border visibility, such as regional click-through rates and indexing status, without imposing ideological constraints on content adaptation.Business Model and Market Dynamics
Revenue Generation and Advertising
Microsoft Advertising operates as the primary platform for monetizing Bing searches through a pay-per-click (PPC) model, where advertisers bid on keywords to display sponsored links and other ad formats atop or alongside organic results.[138][139] This auction-based system determines ad placement via factors including maximum bid, ad relevance, and expected click-through rate, enabling dynamic pricing that reflects real-time competition and user intent alignment.[140] Compared to fixed pricing models, auctions promote efficiency by rewarding higher-quality, relevant ads with better positions and lower effective costs per click, though they can lead to cost volatility for advertisers during high-demand periods; fixed models might stabilize expenses but risk underpricing high-value placements or overpaying for low-relevance ones.[141] In fiscal year 2025, Microsoft's search and news advertising revenue—which encompasses Bing's contributions alongside syndicated partners—grew 13% year-over-year to support overall segment performance, with revenue excluding traffic acquisition costs rising 20%, driven by increased revenue per search and higher search volume.[142][143] This equates to billions in annual earnings, with estimates placing Bing-specific ad revenue around $10-12 billion in recent years, underscoring the model's sustainability through scaled user queries and advertiser spend.[144][145] Year-over-year growth of approximately 20% reflects optimizations like enhanced targeting, potentially augmented by AI-driven personalization in ad delivery, which improves click efficiency without altering the core PPC mechanics.[146][147] The Microsoft Rewards program further bolsters revenue sustainability by incentivizing repeated Bing usage: users earn points for conducting searches, which accumulate toward redeemable rewards such as gift cards or donations, directly elevating query volume and ad impression opportunities.[148][149] Launched to foster ecosystem loyalty, the program has demonstrably increased engagement, as evidenced by sustained point redemptions tied to search activity, without relying on mandatory participation.[150] This mechanic causally links user retention to ad ecosystem vitality, as higher organic traffic amplifies PPC auction participation and revenue per user.[151]Market Share Evolution
Microsoft Bing launched on June 1, 2009, inheriting approximately 8-10% of the search market from its predecessor, Live Search, primarily among Windows users in the United States.[152] By the early 2010s, its global market share had stabilized at around 3%, reflecting challenges in displacing Google's dominance, which exceeded 90% worldwide.[5] This period saw minimal growth, with Bing's share hovering between 2.5% and 3.5% globally through the 2010s, constrained by Google's algorithmic advantages and default integrations on Android and iOS devices.[2] From 2020 to early 2023, Bing maintained roughly 3% global share, with stronger performance in desktop segments—reaching about 9-10% in the US—due to bundling with Windows and Edge browser defaults.[153] The February 2023 integration of OpenAI's GPT technology into Bing as "Bing Chat" (later rebranded Copilot) catalyzed a measurable uptick, contributing to a global increase from 3.37% in early 2024 to 3.97% by January 2025, and further to 4.08% by September 2025.[5] In the US desktop market, this translated to gains from around 12% pre-2023 to 17.09% by September 2025, driven by AI-enhanced query handling that appealed to users seeking conversational search.[6] Mobile share remained low at 0.65%, underscoring platform-specific disparities where Google's Android pre-installations limit Bing's reach.[2] Bing's user base skews toward demographics less captured by Google's mobile-first youth appeal, with approximately 71% of users aged 35 or older, including significant portions in the 45-54 (20%) and 55+ segments.[154] Enterprise adoption bolsters this, as integrations with Microsoft 365 and Azure provide default access for corporate environments, fostering resilience in B2B contexts amid Google's consumer-oriented monopoly.[155] Critics note persistent stagnation relative to Google's 90%+ global hold, attributing it to network effects and inferior indexing scale, though ongoing US antitrust actions against Google—such as the 2024 DOJ remedies mandating Android choice screens—present causal opportunities for Bing to capture diverted traffic without relying solely on AI novelty.[156]| Period | Global Market Share | US Desktop Share | Key Causal Factor |
|---|---|---|---|
| Launch (2009) | ~8-10% (inherited) | ~10-12% | Windows bundling |
| 2010s Average | 2.5-3.5% | ~8-10% | Stability amid Google dominance |
| Pre-2023 | ~3% | ~9-10% | Ecosystem lock-in |
| 2023-2025 (Post-AI) | 3.37% → 4.08% | ~12% → 17.09% | Copilot integration[5][6][108] |
