Final answer:
The title and concept for the 'Sgt. Pepper's Lonely Hearts Club Band' album were conceived by Paul McCartney. It led to a groundbreaking album synonymous with innovation in music and album design. McCartney's idea was instrumental in shaping a new image for The Beatles.
Step-by-step explanation:
The concept and title for the Sgt. Pepper's Lonely Hearts Club Band album is attributed primarily to Paul McCartney of The Beatles. The idea came to McCartney in early 1967 when he was flying from Nairobi to London. He was thinking about the band's new persona as an alternative to touring, which led to the creation of an imaginary band, the Sgt. Pepper's Lonely Hearts Club Band. This allowed The Beatles to experiment more freely with their music and image. The album's concept expanded to include not just the music but also the groundbreaking album cover designed by Peter Blake, which featured The Beatles in costume as the Sgt. Pepper band, surrounded by a collage of famous figures. This album is often celebrated for its innovation and impact on the music industry.