This document defines communication and discusses the key components and types of communication processes. Communication is defined as the sharing of thoughts, ideas, opinions, and emotions between two or more people. The main components of communication include the speaker, listener, message, channel, and feedback. There are different types of communication such as one-to-one, small group, organizational, large group, and mass communication. Barriers to effective communication can be internal, such as health or mental issues, or external, like noise, environment, or lack of motivation. Principles of communication include readiness, sharing, suitability of content, and facilitating feedback.