Privacy concerns with Google

Privacy concerns with Google include a wide range of issues and controversies related to collection, use, and sharing of user data across Google products, services, and platforms, including Google Search. Since the mid-2000s, civil liberties organizations and government regulators have criticized and taken action against Google related to Internet privacy issues in its data collection and data retention policies, web tracking practices, cooperation with intelligence agencies and law enforcement agencies, and other activities. These concerns are a frequent theme in criticism of Google.

In 2007, Privacy International raised concerns regarding the dangers and privacy implications of having a centrally located, widely popular data warehouse of millions of Internet users' searches, and how under controversial existing U.S. law, Google can be forced to hand over all such information to the U.S. government. In its 2007 Consultation Report, Privacy International ranked Google as "Hostile to Privacy", its lowest rating on their report, making Google the only company in the list to receive that ranking.

Around December 2009, after privacy concerns were raised, Google's CEO Eric Schmidt declared: "If you have something that you don't want anyone to know, maybe you shouldn't be doing it in the first place. If you really need that kind of privacy, the reality is that search engines—including Google—do retain this information for some time and it's important, for example, that we are all subject in the United States to the Patriot Act and it is possible that all that information could be made available to the authorities." At the Techonomy conference in 2010, Eric Schmidt predicted that "true transparency and no anonymity" is the path to take for the Internet: "In a world of asynchronous threats it is too dangerous for there not to be some way to identify you. We need a [verified] name service for people. Governments will demand it." He also said that: "If I look at enough of your messaging and your location, and use artificial intelligence, we can predict where you are going to go. Show us 14 photos of yourself and we can identify who you are. You think you don't have 14 photos of yourself on the internet? You've got Facebook photos!"

Google's changes to its privacy policy on March 16, 2012, enabled the company to share data across a wide variety of services. These embedded services include millions of third-party websites that use AdSense and Analytics. The policy was widely criticized for creating an environment that discourages Internet innovation by making Internet users more fearful and wary of what they do online.

In the summer of 2016, Google quietly dropped its ban on personally-identifiable info in its DoubleClick ad service. Google's privacy policy was changed to state it "may" combine web-browsing records obtained through DoubleClick with what the company learns from the use of other Google services. While new users were automatically opted-in, existing users were asked if they wanted to opt-in, and it remains possible to opt-out by going to the "Activity controls" in the "My Account" page of a Google account. ProPublica stated that "The practical result of the change is that the DoubleClick ads that follow people around on the web may now be customized to them based on your name and other information Google knows about you. It also means that Google could now, if it wished to, build a complete portrait of a user by name, based on everything they write in email, every website they visit and the searches they conduct." Google contacted ProPublica to correct the fact that it didn't "currently" use Gmail keywords to target web ads.

Shona Ghosh, a journalist for Business Insider, noted in 2019 that an increasing digital resistance movement against Google had grown. A major hub for critics of Google in order to organize to abstain from using Google products is the Reddit page for the subreddit r/degoogle. The Electronic Frontier Foundation (EFF), a nonprofit organization which deals with civil liberties, raised concerns in 2018 regarding privacy issues pertaining to student data after conducting a survey which showed that a majority of parents, students and teachers are concerned that student privacy is being breached. According to the EFF, the Federal Trade Commission has ignored complaints from the public that Google has been harvesting student data and search results even after holding talks with the Department of Education in 2018.

In 2019, Google blocked W3C privacy proposals using their veto power. The W3C decides how the World Wide Web works, and Google vetoed a measure to expand W3C's power within its internet privacy group.

On March 10, 2009, Google reported that a bug in Google Docs had allowed unintended access to some private documents. It was believed by PCWorld that 0.05% of all documents stored via the service were affected by the bug. Google stated the bug has now been fixed.