Topic summary
B-sides
Extracted from the Wikipedia article A-side and B-side.
Characteristics
B-sides are often considered to be filler material: songs of lower quality. However, pop artists such as Prince, New Order, Pet Shop Boys, Def Leppard, the Cure, Tori Amos, Bon Jovi, Oasis, and the Beatles have been particularly known for releasing strong material on B-sides. B-sides have often been compiled on or may be compiled into a B-side compilation album across multiple periods of an artist's career.