how to understand the punctuation mark

Punctuation marks are symbols that are used in writing to help break up sentences and make them easier to understand. For example, a period (.) at the end of a sentence marks the end of a statement. A comma (,) is used to separate ideas in a sentence, and a question mark (?) is used to indicate a question. An analogy may help you to understand the purpose of punctuation: Punctuation is like a traffic light. A period is like a red light – it stops the sentence. A comma is like a yellow light – it slows the sentence down. And a question mark is like a green light – it helps the sentence move forward. Fun Fact: Punctuation was first used in the written language of ancient Greeks in the 2nd century BC.