Audience laughter has been a staple of broadcast comedy since early radio and television, where live studio crowds reacted in real time to performers on stage. As short-form video and meme editing grew, creators lifted that familiar reaction out of its original setting and began using it as a standalone cue to signal that something was funny. It remains popular because it is instantly understood across languages and needs no explanation, working as a universal shorthand for humour in edits, streams and social clips.