This document discusses consumer motivation and different theories that explain it. It explains that motivation comes from biological, emotional, rational, and social forces that direct behavior toward goals. Consumer motivation theories covered include Maslow's hierarchy of needs, which arranges needs into 5 levels from basic physiological needs to self-actualization; Thorndike's law of effect, which states consumers are motivated to buy products with positive results and avoid negative ones; and Alderfer's ERG theory, which categorizes needs into existence, relatedness, and growth. The document provides examples of how each type of motivation influences consumer purchases.