It denotes the end of a sentence.
They are used to denote text, speech, or words spoken by someone else.
They are used to supply further details or information or as an aside
One way to use it is when introducing something.
They are meant to show that a letter or letters have been omitted and also to indicate the possessive or contractions.
It is used to insert a pause into a sentence.
It ends a sentence that is a direct question.
It links two independent clauses.
It is used at the end of a sentence when that sentence expresses an intense emotion.
