The document discusses various factors that influence consumer behavior and models of consumer behavior. It describes cultural, social, personal, and psychological factors. It then explains several traditional and contemporary models of consumer behavior, including the economic model, learning model, psychoanalytical model, sociological model, Howard Sheth model, Nicosia model, Engel-Blackwell-Minard model, and Webster-Wind model. Each model is summarized with an example to illustrate how it applies to understanding consumer decisions.