This sound comes from Minecraft and is associated with experience orbs, the floating XP drops collected by the player during gameplay. Because Minecraft became one of the most recognisable games online, even tiny UI and pickup noises like this spread into edits, compilations and short-form memes. Creators keep using the orb sound because it communicates reward, progress and instant satisfaction in less than a second, much like the iconic roblox oof became shorthand for failure in gaming clips.