This document discusses consumer behavior and its importance for marketing. It defines consumer behavior as the activities involved in obtaining, consuming, and disposing of products and services. Understanding consumer behavior draws from various disciplines like psychology, sociology, economics, and marketing. It is important because most new products fail within a few years, showing the need to understand what consumers want. The document outlines factors shaping consumer research and lists variables that influence consumer behavior like culture, marketing activities, and internal influences like emotions and attitudes. It presents an overall model of consumer behavior and decision processes.