The document discusses the consumer decision making process, which has three stages: pre-purchase, consumption, and post-purchase. In the pre-purchase stage, consumers go through problem recognition, information search, and evaluation of alternatives. They are influenced by commercial, social, and physical cues. During consumption, they buy, use, and dispose of the product or service. In the post-purchase stage, they evaluate their decision for cognitive dissonance reduction. The goal is to understand consumers' choices and evaluations at each stage of the process.