The laugh track has been a staple of television comedy for decades, giving sitcoms the feel of a live studio audience even when viewers watched at home. Online, short crowd-laughing clips became a handy shorthand for creators who want that same instant reaction without filming an audience. This type of sound is now common in reaction videos, comedy skits, memes and short-form edits, where a few seconds of shared laughter can turn a simple joke into a communal moment. Its familiarity is why it still works across platforms and formats.