The document provides rules for using semicolons to join independent clauses and sentences. It explains that semicolons emphasize a close relationship between clauses in a way that is stronger than a comma but not as final as a period. It then lists 5 rules for using semicolons: to join two independent clauses when a conjunction is omitted, to link two independent clauses or sentences joined by a conjunction, before introductory transition words followed by a clause, to separate items in a list containing commas, and to place outside quotation marks when dealing with quotations.