The Mothers of Invention was an American rock band formed in 1964, led by musician Frank Zappa. Known for their experimental sound, they blended rock, jazz, and avant-garde music, often incorporating satirical and political themes in their lyrics. The band gained popularity with albums like Freak Out! and We're Only in It for the Money. The lineup changed frequently, but key members included Don Preston, Bunk Gardner, and George Duke. The Mothers of Invention were influential in the development of progressive rock and are celebrated for their innovative approach to music and performance, leaving a lasting impact on the music industry.