Meaning
A single bold exclamation mark, usually in red. It means attention, importance or warning, the visual equivalent of raising your voice once.
It is everywhere in notices, reminders and sales posts to flag the key point: “❗Class moved to room 302 tomorrow” In chats it adds urgency or surprise without going overboard like ‼️. Placed at the start of a line, it becomes an eye-catching bullet for rules and warnings.