This function is used to search for artwork from Fanart.tv, the Cover Art Archive and Discogs for an album cover.
A variant called Auto Search then Search for Album Cover Fanart, CAA & Discogs will perform an Auto Search first.
The Search for Artwork, Only keep Largest Album Cover option can constrain the number of album covers imported to one. This option is found on the panel displayed by the Search for Artwork menu's Fanart.tv, Cover Art Archive, Discogs Settings item.