Martim Feliz comes from the world of Portuguese-language WhatsApp voice messages, where short personal audios are forwarded, saved and replayed far beyond their original chat. Like many clips in that culture, its appeal is not a famous show or celebrity moment but its recognisable, everyday feel, which makes it easy to reuse as a reaction. Once added to soundboard collections, it began circulating among users looking for a quick, positive response sound, and it has stayed useful because a short happy voice cuts through text chats and adds personality that an emoji alone cannot match.