This document discusses consumer behavior and related concepts from various fields like psychology, sociology, and anthropology. It defines consumer behavior as the process people engage in to search for, select, purchase, use, and dispose of products and services. Companies need to understand factors like who their customers are, how and why they make purchases, and what influences their decisions in order to develop effective marketing strategies. The document also outlines several concepts in marketing like the production, selling, product, and marketing concepts which shifted focus over time from production to understanding customer needs.