Canned laughter was created for American television comedies in the 1950s, when producers wanted a live audience reaction for shows recorded without one, and the technique quickly became a signature of the classic sitcom. As home editing and online video grew, the same laugh track moved from broadcast television into YouTube sketches, reaction videos and memes, where a short burst instantly frames a moment as comedy. It remains popular because it is instantly recognisable, needs no explanation, and turns an otherwise ordinary clip into something that feels like a television show.