This document provides an overview of communication skills and effective communication. It discusses key concepts such as the communication process, barriers to communication, models of communication, and the 7 C's of communication. Specifically, it outlines the three primary steps of communication as thought, encoding, and decoding. It also identifies various barriers to effective communication including physical, system design, attitudinal, ambiguity of words/phrases, individual linguistic ability, physiological, and communication noise. Finally, it discusses the sender-message-channel-receiver model of communication and defines the seven C's of communication as credibility, context, content, clarity, continuity and consistency, channels, and capability of audience.