What are exclamation points used for?
They are used for showing that you are surprised or mad or showing a great deal of an emotion.
Thank you so much!
You ate my banana!? (It is technically a question, so you have to add question mark)
Exclamation marks capture happiness and emotion of the speaker
Like the name says, exclamation points (or marks) are used for capturing excitement and emotion. Take the following sentences:
"I just won the lottery!"
I believe we can all agree that whoever says that would be happy, and the exclamation mark is a way of showing that.
"I haven't seen you in years!"
Perhaps this is old friends seeing each other. I would love to see my friend from 7 years ago, or whatever it might be.
Sometimes, it's not for happy moments- exclamation marks can be used to signal if someone is serious or upset.
In summation, exclamation marks are a writer's way of expressing the emotion, good or bad, he/she is feeling.
Hope this helps!