This sound comes from The Witcher 3: Wild Hunt, the fantasy action RPG released by CD Projekt in 2015. Players associate it with the game’s progression and reward feedback, so it quickly became useful outside the game in edits and memes. Online, it is often added when someone gains experience, unlocks a new ability or jokingly “levels up” in real life. Its continued use comes from how clearly it communicates achievement in only a few seconds.