Xiao Xiao circulates mainly as a TikTok trend sound rather than a clip tied to a widely documented film, show or song, so its appeal comes from recognition on the platform itself. Short-form creators reuse the same short audio across edits, reactions and compilations, which helps new viewers recognise it instantly even without knowing its first upload. That shared familiarity keeps it in rotation for light, meme-style videos where a familiar TikTok sound does more work than an unfamiliar track.