Serial Comma within a Sentence

A series is a list of related items. When there is a series of three or more items within a sentence, and a coordinating conjunction such as and, but, or, nor, for, yet, and so appears before the final item, put a comma after each item — and before the conjunction. The pattern looks like this:

Note: The series can appear at any point in the sentence including subject, verb, object, and even modifiers. The punctuation pattern is the same.