Discogs acts as a single source of truth for collectors concerned about the minutia of those variations of a single published work. It allows them to accurately keep track of both what they have, and what they are searching for through digital collection lists and wantlists, respectively. Each item links to a specific release version page.
People also use it to discover new music using its search tool to filter with high granularity by parameters like country, year, medium, genre/style and other selectors. Though it supports documentation of digital releases, it has a special emphasis on physical media, and also serves as an online marketplace for those media.