This document provides information about run-on sentences and how to identify and correct them. It defines a run-on sentence as two or more complete sentences written as one sentence without proper punctuation or conjunction. To fix run-on sentences, they can be separated into two sentences with end punctuation and capitalization, or joined properly with a comma and conjunction to form a compound sentence if the ideas are closely related. The document gives examples and exercises for the reader to practice identifying and revising run-on sentences.