This short effect comes from Super Auto Pets, an auto-battler game in which players build a team of animals and watch them battle automatically. When a pet earns enough experience to gain half a level, the game plays this brief chime to mark the progress before the next round. Clips of the game have circulated widely on video platforms and soundboards, where the cue is now recognised by players even outside a match. Its short length and clear, positive tone keep it useful as a quick reward signal in edits and streams.