This document discusses levels and functions of communication. It outlines 8 levels of communication context - intrapersonal, interpersonal, public speaking, small group, organizational, mass communication, new media, and intercultural. It also describes 3 main functions of communication - to develop higher mental processes, fulfill social needs as social animals, and exert control and persuasion over oneself and others. Communication can occur across multiple levels simultaneously and levels are used to organize our understanding, while functions are the purposes and outcomes of human communication.