Final answer:
The Beatles started working on 'Sgt. Pepper's Lonely Hearts Club Band' after they ceased touring, an album that represented a major shift in their musical direction and influenced the future of rock and pop music.
Step-by-step explanation:
After the Beatles stopped touring, they began working on the album 'Sgt. Pepper's Lonely Hearts Club Band'. This groundbreaking album marked a significant transformation in the band's musical style, incorporating innovative recording techniques, and diverse influences.
The album represents a pivotal moment in the history of rock and pop music, often regarded as a masterpiece that helped redefine what was possible in the recording studio. It veered away from the Beatles' previous image, embodying a more complex, mature, and experimental direction that would influence countless artists and music genres.