Yes is a British progressive rock band formed in 1968. Known for their symphonic style, harmonized vocals, and complex song structures, the group played a significant role in defining the progressive rock genre. Key members include Jon Anderson, Chris Squire, and Steve Howe. Their most successful works include the albums "Fragile" and "Close to the Edge," and the hit single "Roundabout," all of which have had a profound influence on the development of progressive rock.