Yes are an English progressive rock band formed in London in 1968 by lead singer Jon Anderson, bassist Chris Squire, guitarist Peter Banks, keyboardist Tony Kaye, and drummer Bill Bruford. The band has undergone numerous lineup changes throughout their history, during which 20 musicians have been full-time members. Since February 2023, the band has consisted of guitarist Steve Howe, keyboardist Geoff Downes, bassist Billy Sherwood, singer Jon Davison, and drummer Jay Schellen. Yes have explored several musical styles over the years and are most notably regarded as progressive rock pioneers.

Progressive rock is a broad genre of rock music that primarily developed in the United Kingdom through the mid- to late 1960s, peaking in the early 1970s. Initially termed "progressive pop", the style was an emergence of psychedelic bands who abandoned standard pop traditions in favour of instrumentation and compositional techniques more frequently associated with jazz, folk, or classical music. Additional elements contributed to its "progressive" label: lyrics were more poetic, technology was harnessed for new sounds, music approached the condition of "art", and the studio, rather than the stage, became the focus of musical activity, which often involved creating music for listening rather than dancing.