Short Portuguese greetings like this circulate widely in messaging apps and on social video, where a familiar everyday phrase can become a reusable reaction clip. Bom dia is a standard morning greeting in Portuguese, and quem é adds a curious, slightly playful question that changes a simple hello into a scene with a second person. Because the wording is common and the delivery is easy to understand, creators reuse it for arrivals, wake up jokes, door scenes, and chat recreations without needing any extra context for viewers.