This document provides an introduction to behavior change communication (BCC) and discusses key concepts. It begins by defining behavior and the five key facts about human behavior. It then discusses information, education, and communication (IEC) and how it relates to health promotion. BCC is introduced as going beyond just information provision to motivate behavior change. The document outlines three elements of the BCC process - the rational, emotional, and practical elements. It also discusses five guiding principles for effective BCC.