This document discusses various types and aspects of communication. It begins by defining communication and noting its origins. It then discusses the evolution of communication methods from smoke signals to the internet. The document outlines the characteristics, significance, purposes and process of communication. It describes different types of communication based on direction (downward, upward, lateral/sideward) and channel (formal vs informal). Key aspects covered include feedback, the grapevine communication network, and advantages and disadvantages of different communication methods.