The number is the official Steam Application ID for the video game Project Zomboid . Your search query likely refers to downloading custom music for use with game mods like "True Music," which allow players to add their own audio files to the game's world. Custom Music in Project Zomboid (App ID 108600)
: Files are placed in subfolders for "TCBoombox" (cassettes) or "TCVinylplayer" (records).
: A song by Hayley Reardon that reached exactly 108,600 streams on Spotify.