The document defines conjunctions as words that join words or groups of words together. It lists common coordinating conjunctions like "and", "or", and "but" and provides examples of their use. It also explains two types of conjunctions - coordinating and correlating. Correlating conjunctions connect words used in the same way, such as "both...and", "either...or", and "not only...but also". The document concludes with an assignment to identify conjunctions and the words they join in several sentences.