This document provides an overview of consumer behavior concepts. It defines consumer behavior as the processes consumers use to make purchase decisions and use/dispose of products. It then discusses the consumer decision-making process in 5 steps: need recognition, information search, evaluation of alternatives, purchase, and post-purchase behavior. It also covers factors that influence consumer behavior such as cultural, social, psychological, and individual factors. Specific topics covered include reference groups, opinion leaders, social classes, values, subcultures, and perception.