Bom dia is the everyday Portuguese greeting for good morning, widely shared in Brazil and Portugal as text, stickers and voice notes. Clips named for João Carvalho circulate as a personal version of that ritual, passed between contacts who send a daily hello to keep group chats active. Its popularity comes from familiarity rather than novelty, as the greeting fits birthdays, work chats and family threads alike. Shared as a short sound, it works as both a sincere morning wish and a playful meme reply.