Grammarians disagree over whether a comma should be placed before the conjunction in a series (the underlined comma in example 2 below is a “serial comma”). However, confusion can be avoided by adding ...

When combining two complete sentences with a conjunction ("and," "but," "or," "for," or "yet"), precede the conjunction with a comma. Example: Still, the sun is slowly getting brighter and hotter, and ...

And you don't have to be a grammar professional to have an ... and more for those of you unfamiliar with the Oxford comma rule, including examples for each. Related: What Exactly Is the Difference ...

A few less-common yet well-placed punctuation marks can give your application essay a sophisticated edge. For example, consider adding a semicolon to connect two closely related sentences ...