[6] As with 1962–1966, the compilation was created by Apple and EMI/Capitol Records in response to a bootleg collection titled Alpha Omega, which had been sold on television the previous year.

[7] The success of the two official double LP compilations inspired Capitol's repackaging of the Beach Boys' 1960s hits, starting with the 1974 album Endless Summer.

[8] A deluxe expanded version of the album was released on 10 November 2023, featuring the previously unreleased song "Now and Then", the final original single by the group.

The U.S. edition had "Strawberry Fields Forever" in its original 1966 stereo mix, while "Penny Lane" and "Hello, Goodbye" were presented in mono, and "I Am the Walrus" with a four-beat electric piano introduction; the UK version had the more common six-beat beginning.

The original compact disc edition, meanwhile, featured a clean version previously heard on the Imagine: John Lennon soundtrack album in 1988.

[15] On the Spanish edition, "One After 909" replaced "The Ballad of John and Yoko", a song that had been banned from the airwaves shortly after being released as a single in 1969, for its allusions to "Christ" and "Gibraltar" in the lyrics.

Six tracks ("I Am the Walrus", "The Fool on the Hill", "Magical Mystery Tour", "Revolution", "Hey Bulldog", and "Old Brown Shoe") received new stereo mixes for this release.

Of note, both "A Day in the Life" and "Dear Prudence" feature clean openings on the 2023 release, as opposed to their album counterparts, which are crossfaded with their respective preceding tracks.