Use a comma to separate two independent clauses when they are joined by one of seven coordinating conjunctions (for, and, nor, but, or, yet, so). We were out of ice cream, so I went to the store. (c) ...

From VOA Learning English, this is Everyday Grammar. Imagine you are taking a trip in a foreign country. You are driving a rental car that you got at the airport. What could help you find your way in ...