Commas: Quick Rules - Purdue OWL® - Purdue University
https://owl.purdue.edu/owl/general_writing/punctuation/commas/index.html
WebQuick Guide to Commas. Use commas to separate independent clauses when they are joined by any of these seven coordinating conjunctions: and, but, for, or, nor, so, yet. Use commas after introductory a) clauses, b) phrases, …
DA: 10 PA: 47 MOZ Rank: 98