Meaning
An exclamation mark and a question mark joined side by side, usually in red. It means a surprised or outraged question: you are asking something while reacting strongly, like saying “what?!” out loud.
It is perfect for disbelief and mock outrage in comments and group chats: “You finished the whole cake alone⁉️” People also put it in headlines and captions to spark curiosity. It differs from the interrobang ‽, a single merged punctuation mark, and typing plain !? keeps a calmer text look.