Applause and cheering have long been used in radio, television and live performance to signal approval, and that same cue transferred naturally to online video and streaming. Because the sound is instantly recognisable without any words, creators can drop it into almost any format, from gaming highlights and reaction clips to award announcements and comedy sketches. It remains popular because it adds social proof to a moment, making a single creator's achievement feel like it has been witnessed and endorsed by a crowd.