Shared online as a short standalone clip titled zoccolo, the Italian word for a hoof and also for a wooden clog, this sound circulates mainly as a practical effect rather than a song or line of dialogue. Creators pull it into memes, short videos, and soundboard collections when they need an unmistakable step that listeners recognise instantly. Its popularity comes from that double meaning — it fits both animal footage and human footwear jokes — and from how cleanly the knock cuts through phone speakers, making even a silent walk feel staged and funny.