Conversation so far:
Is Her Majesty the name of a Beatles' album?
recorded by McCartney on 2 July when he arrived before the rest of the group at Abbey Road.
Did the rest of the Beatles' like "Her Majesty"?
The Beatles liked this effect and included it on the album.

Question: What was the effect that the Beatles' liked?
Self-contained rewrite: What was the effect in the album "Her Majesty" that the Beatles' liked?