Online, this clip is best known as a Peruvian TikTok reaction sound, shared widely in Spanish-language meme videos where a creator points out someone unexpected. The phrase is everyday Spanish for asking who someone is, so it needs no setup and works across jokes, pranks, and reaction edits. Its short length makes it easy to drop over a reveal or a crowd shot, and its curious, slightly teasing tone keeps it useful for lighthearted callouts rather than serious confrontations, which is why it keeps appearing in new edits.