This document discusses communication and its purposes. It defines communication as the imparting or exchanging of information through speaking, writing, or other mediums. The document outlines the principles, objectives, purposes, and types of communication, including formal vs informal communication. Communication types are also categorized based on the communication channels used, such as verbal (oral or written) vs nonverbal communication. The document stresses that choosing the appropriate communication channel is important for effectively conveying messages and not undermining the intended purpose.