Dota 2 is Valve's multiplayer online battle arena game, in which two teams of five heroes compete to destroy the opposing team's Ancient. Its matchmaking system plays a bell when a match has been found and players must accept within a short window, a moment familiar to anyone who has queued for ranked or casual play. Clips of that chime spread through gameplay videos, streams and short-form edits, where creators reuse it as shorthand for readiness, anticipation and the start of a contest. It remains popular because the sound is short, clear and tied to a game about to begin.