Neo soul (sometimes called progressive soul) is a genre of popular music. As a term, it was coined by music industry entrepreneur Kedar Massenburg during the late 1990s to market and describe the style of music that emerged from soul and contemporary R&B. Evolving from soul music, neo soul is distinguished by a less conventional sound than its contemporary R&B counterpart, with elements ranging from funk, jazz fusion, hip hop and rock. It has been noted by music writers for its conscious lyrics.

Neo soul developed during the 1980s and early 1990s, by Black-Americans in the United States, as a soul revival movement. It earned mainstream success during the late 1990s, with the commercial and critical breakthroughs of several artists, including D'Angelo, Maxwell, Erykah Badu, and Lauryn Hill. Their music was marketed as an alternative to the producer-driven, digitally approached R&B of the time, although many of them were ambivalent about the term.

Since its initial mainstream popularity and impact on the sound of contemporary R&B, neo soul has been expanded and diversified musically through the works of both American and international artists. Its mainstream presence declined during the 2000s, although newer artists emerged through more independent means of marketing their music. In his book The Essential Neo Soul (2010), music journalist and culture critic Chris Campbell writes that, while the genre has been "woefully misunderstood", there is "a historical and social relevance that validates its designation as the current face of alternative progressive soul music (in both underground and overground circles), complete with a distinct origin and developmental evolution". According to Mark Anthony Neal, "neo-soul and its various incarnations has helped to redefine the boundaries and contours of black pop."

By definition, neo-soul is a paradox. Neo means new. Soul is timeless. All the neo-soul artists, in various ways, perform balancing acts, exploring classic soul idioms while injecting a living, breathing presence into time-tested formulas. They humanize R&B, which has often been reduced to a factory-perfected product. Like sushi, neo-soul is fresh enough to be served raw.

As a term, neo soul was coined by Kedar Massenburg of Motown Records in the late 1990s as a marketing category following the commercial breakthroughs of artists such as D'Angelo, Erykah Badu, Lauryn Hill, and Maxwell. The success of D'Angelo's 1995 debut album Brown Sugar has been regarded by several writers and music critics as the inspiration behind the term's origin. In a 2002 interview for Billboard, Massenburg said that genre classifications are often unpopular because they may be suggestive of a short-lived trend. However Massenburg felt there was a need to market artists of the genre for listeners to have an understanding of what they were listening to.

In a 2010 article for PopMatters, music writer Tyler Lewis said that neo soul has been received with much controversy: "Given the way black music has been named by (usually) outsiders ever since the blues, the reaction to the name by artists who ostensibly fit into the 'neo-soul' category represents a wonderful example of black self-determination in an industry that is still defiantly wedded to narrow definitions and images of black folks." Jason Anderson of CBC News compares the etymology of neo soul to that of "new wave" and comments: "neo-soul is still an effective tag to describe the mix of chic modernity and time-honoured tradition that distinguished the genre's best examples. Neo-soul artists tried to look both backward and forward, acting in the belief that a continuum might exist."

The term received widespread use by music critics and writers who wrote about artists and albums associated with the musical style. African American studies professor Mark Anthony Neal has described neo soul as "everything from avant-garde R&B to organic soul ... a product of trying to develop something outside of the norm in R&B". According to music writers, the genre's works are mostly album-oriented and distinguished by its musicianship and production, incorporating "organic" elements of classic soul music with the use of live instrumentation, in contrast to the more single-oriented, hip hop-based, and producer-driven sampling approach of contemporary R&B. Neo soul also incorporates elements of electronic music, jazz fusion, funk, rap, gospel, rock, reggae, and African music. In her book Musical Rhythm in the Age of Digital Reproduction, music author Anne Danielsen wrote that neo soul toward the end of the 1990s exhibited a musical development that was part of "a remarkable increase in musicians' experimentation with and manipulation of grooves at the microrhythmic level – that is, the level in played music that is usually understood in terms of phrasing and timing."

Noting that most of the genre's artists are singer-songwriters, writers have viewed their lyrical content as more "conscious-driven" and having a broader range than most other R&B artists. AllMusic calls it "roughly analogous to contemporary R&B." Dimitri Ehrlich of Vibe said that they "emphasize a mix of elegant, jazz-tinged R&B and subdued hip hop, with a highly idiosyncratic, deeply personal approach to love and politics". Music writers have noted that neo soul artists are predominantly female, which contrasts the marginalized presence of women in mainstream hip hop and R&B. Jason Anderson of CBC News called neo soul a "sinuous, sly yet unabashedly earnest" alternative and "kind of haven for listeners turned off by the hedonism of mainstream hip-hop and club jams." Neo soul artists are often associated with alternative lifestyles and fashions, including organic food, incense, and knit caps.