The document discusses several factors that influence consumer behavior, including reference groups, family and culture. It defines reference groups as individuals or groups that serve as a point of comparison and influence evaluations, aspirations, and behaviors. Reference groups can include family, friends, and celebrities. Family and culture also shape consumer decisions. Culture refers to shared values, norms, and beliefs passed down through generations that impact tastes and preferences. Subcultures within a culture may differ based on attributes like ethnicity, age, religion, and location. Social classes and groups further influence consumer norms and status. Marketers study these factors to understand consumer decision-making.