This document defines communication and discusses its key aspects. It defines communication as the process of passing information between people to build understanding. The document notes communication is unavoidable, continuous, two-way, universal, and serves multiple purposes. It also discusses the need for effective business communication due to factors like growing complexity, competition and specialization. Finally, it outlines the basic process of communication which involves a sender encoding a message, sending it through a channel, a receiver decoding the message, and providing a response or feedback.