This document discusses coordinating conjunctions and how they are used to combine two independent clauses. It defines a coordinating conjunction as connecting two independent clauses using words like "for", "and", "nor", "but", "or", "yet", and "so", known by the mnemonic "FANBOYS". It provides examples of how to identify independent clauses and properly use a coordinating conjunction with a comma to join two related clauses. The lesson emphasizes that not every word in the FANBOYS list functions as a coordinating conjunction and provides a trick for determining proper use between clauses.