This document defines consumer behavior and identifies different types of consumers and factors that influence purchasing decisions. It discusses household, industrial, and reseller consumers and habit-determined, cognitive, emotional, new, and impulsive consumer groups. The significance of studying consumer behavior includes determining production, pricing, distribution, sales promotion, and competition strategies. Economic factors like income, assets, credit, and conditions affect behavior. Sociological determinants include family, reference groups, opinion leaders, social class, and culture. Psychological factors comprise motivation, perception, image, learning, attitudes, beliefs, personality, lifestyle, age, education, occupation, income, roles, and family lifecycle stage. Motivational research seeks unconscious motivations for choices.