This document provides an overview of consumer behavior and how it is studied. It defines consumer behavior as the activities people undertake when obtaining, consuming, and disposing of products and services. Consumer behavior involves influences on consumers at both the individual level (e.g. culture, personality) and organizational level (e.g. advertising, promotions). Researchers study consumer behavior using methods like observation, interviews, surveys, and experiments in order to understand purchase decisions and consumption activities. Understanding consumer behavior is important because it determines the success of marketing programs and the economic health of individuals, organizations, and nations. It also helps formulate effective public policy.