The phrase itself is simple everyday Portuguese, with gatinho meaning little cat or kitty, and dança meaning dance, so the appeal needs no explanation for Brazilian and Portuguese-speaking audiences. Short spoken phrases like this circulate widely on soundboards and in short-form video because they can be understood instantly, even out of context. Users keep reposting the clip as a quick audio sticker for pets, especially cats moving rhythmically, and it survives mainly for its timing: half a second is long enough to land the joke and short enough to replay.