He He comes from the Mandarin expression hehe, written as two identical characters that represent light laughter online. In Chinese internet slang the phrase is flexible, used for genuine amusement, polite laughter, embarrassment or dry sarcasm depending on context. The audio version turned that text laugh into a reusable reaction sound for short videos, edits and soundboards, where a brief giggle can replace a comment entirely. Its popularity comes from that ambiguity, letting creators signal they are laughing with someone or quietly laughing at a situation without adding words or a harsher laugh track.