This document discusses the key aspects of communication. It defines communication as the transmission and receiving of information between people that involves a change in behavior and the expression of thoughts. The communication process involves a message being encoded by a sender and sent through a channel to be decoded by a receiver. Feedback allows the sender to analyze if the message was understood correctly. The document outlines the main components of communication - the message, sender, encoding, channel, decoding, receiver, and feedback. It also discusses some features of communication like it being a two-way process, goal-oriented, and continuous.