Punctuation

"Punctuation is the collection of marks that we use to make sentences flow smoothly and express meaning clearly. Originally, punctuation was only a tool for speech, not for writing. Writers developed it so that people would know when to pause, stop, or make other expressions when they were speaking. It wasn’t part of literature because most people didn’t even have access to printed work. But, nowadays, since everyone reads, and printed literature is available for everyone, we use punctuation in writing so that sentences read in a similar way to how we speak. Knowing how, when, and why to use punctuation is now a standard part of writing in English" 

The following information was taken from the internet, as well as the explanation above.