Commas are used for in the following situations:

Commas are used with lists.

Commas are used with addresses, dates and Titles.

Commas are used with Independent and Dependent Clauses.

Commas are for interruptions in sentences.

Commas are used with nonessential clauses.

Commas are ued for introductory clauses, phrases and word/s.

Comma Usage

Comma Usage - Lists

Comma Usage - Independent Clauses

Independent and Dependent Clauses

Nonessential Clauses-Commas

The Difference between Clauses or Phrases

Introductory Phrases, Clauses and Words with Commas

Commas Usage With Titles, Dates & Addresses