And you don't have to be a grammar professional to have an opinion on the matter. It's the timeless debate between the Oxford comma and the regular comma. But, what is the Oxford comma ...

An Oxford, or serial, comma is the last comma in a list; it goes before the word "and." Technically, it's grammatically optional in American English. However, depending on the list you are writing ...

"Grammar is language glue that binds us together ... Commas of all kinds come up in those discussions a lot, but the Oxford comma — which goes before "and" in a list — brings out especially ...