Question

what does '!' exclamation mark means
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Answer 1

The exclamation mark, !, also sometimes referred to as the exclamation point, especially in American English, is a punctuation mark usually used after an interjection or exclamation to indicate strong feelings or high volume (shouting), or to show emphasis, and often marks the end of a sentence, for example: "Watch out ...

Answer 2

it explains us about a when sudden things happens the way we Express our feelings.

hope it helps ...