Short vocal chirps like this one circulate widely as reaction sounds because they are instantly recognisable even without context. The word peko is associated online with cute, rabbit-like characters and playful streamer culture, where a single chirp can signal excitement, cheekiness or mock innocence. Its sub-second length makes it easy to reuse across short-form video, where creators need a sound that lands immediately and does not interrupt dialogue. That portability is why brief peko-style clips keep appearing in edits long after their first viral uses.