Meaning
A golden crown set with jewels, the headwear of kings and queens. It signals royalty, status and excellence, and in casual chat it crowns someone as the best at something.
Fans and friends use it as praise: “You aced the presentation, queen 👑” It also shows up in bios to mark confidence or a nickname, and in posts about winners and champions. Used about yourself, it can come across as playful swagger or as bragging, depending on the audience, so the tone of the rest of the message matters.