Commas are one of the most important punctuation marks for writers. They can be used to break up a sentence, provide clarity to readers, and even change the meaning of a sentence. Knowing when and how to use commas can be tricky, but it’s important to get it right. The most basic purpose of commas is to create pauses. Where commas appear in a sentence, a reader can pause because the author knows there is a natural break in the sentence. The pauses provide a kind of rhythm that is pleasing to readers while also helping to provide clarity. Commas are used to set off items in lists, and to separate parts of a sentence, such as a dependent clause from the main clause. Commas are also incredibly powerful tools in how they can change the meaning of a sentence. A sentence without a comma before a coordinating conjunction such as “and” or “but” can have a very different meaning than one with the comma. Adding a comma can also indicate a change in speakers or a bit of a dramatic pause in spoken dialogue. Commas, then, are an important part of grammar and writing, and it’s important that authors understand when and how to use them. Misusing or avoiding commas can lead to a lack of clarity and make a sentence difficult to read and understand. Knowing when to use commas is a key part of becoming a great writer.