Comment pop-up sounds grew out of the notification tones built into social apps and messaging platforms, where a short chime tells users that someone has responded without interrupting what they are doing. Video creators adopted the same idea for edits, using the cue to draw attention to comments, replies, and live chat without needing on-screen text alone. It remains popular because it is instantly recognisable, easy to understand across languages, and fits the fast pace of reaction videos, streams, and short-form content where audience interaction is part of the joke.