Instagram Reels launched as short vertical videos where a single trending audio can be reused across thousands of posts. Clips like this spread when creators save the sound from one Reel and apply it to their own edits, turning a brief meme audio moment into a shared format. Because the format relies on recognisable audio cues, short sounds are passed around soundboards and editing apps for fast reuse outside the app. The appeal is speed and familiarity, with viewers recognising the setup from the first seconds and expecting a payoff before the clip ends.