Punctuation is marking that clarifies sentences. if you write a sentence that is a string of words even if theyre good words but you do it without punctuation then it will look like this making your reader unhappy
Punctuation tells you when a sentence has come to an end, or if it's a question, and you can't write a sentence without at least one punctuation mark: the period. You can also use punctuation to talk about non-verbal emphasis. If you tell your dog to stop chewing your shoe, you might stamp your foot as punctuation. A slow speaker who chews slightly at the end of each sentence has an unfortunate kind of punctuation.