This document outlines the key elements of communication: source, message, channel, receiver, effect, and feedback. It defines communication as conveying opinions, feelings, information, body language, signs, and ideas through spoken or written words. The source is the originator of the idea and sender of the message. The message is the content passed from sender to receiver. The channel is the medium used, such as mass media or interpersonal. The receiver is the intended audience. The effect is the change in receiver's behavior. Feedback is the response from the receiver back to the sender.