Applause is one of the most reused crowd sounds in online video because it needs no explanation: everyone recognises the sound of a live audience approving something. Creators use the same type of recording across reaction videos, livestreams, podcasts, sports edits and meme compilations, often as a soundboard button for instant celebration. Its popularity comes from that flexibility, since it can praise a performance, mock a small achievement with irony, or close a clip on a high note, and it still feels natural after years of constant use.