1) The document discusses various social influences on consumer behavior, including reference groups, normative influence, and informational influence. 2) Reference groups are individuals or groups that influence attitudes, values, and behaviors. Normative influence is the pressure to conform to the expectations of others in a social group. Informational influence is when people accept information from others as evidence about reality. 3) Psychographics examines how psychological and behavioral characteristics like values, personality traits, and lifestyles influence consumer behavior. Values are deeply held beliefs that guide attitudes and behavior. Personality traits and lifestyles can also provide insights for market segmentation and targeting.