Consumer behavior is influenced by personal, cultural, and social factors that shape individuals' needs and wants. Personal factors include demographic characteristics like age, lifestyle, and psychological life cycle events. Cultural influences encompass values emphasized in different cultures like individualism, respect, and hard work. Socially, reference groups from family and friends to religious groups impact buying decisions directly through interaction and indirectly as aspirational models. Consumer choices reflect an effort to satisfy needs while expressing self-concept and cultural values.