It refers to the publishing company of music albums, especially in the fields of rock or independent music.

In the rock or independent music industry, the music albums published by a company are usually of a relatively similar style, so over time, some well-known companies, that is, labels, represent a certain music style.

For example, the label 4AD represents independent music, Sub pop is Grunge, Earache is mostly death metal, and Projekt is basically black wave. You can generally know the style of an album through the label.