Every human being's subconscious mind is responsible for making decisions much before the conscious one interferes. ‘Consumer Behavior’ involves studying the processes a consumer uses to make purchase decisions, to dispose of purchased goods or services and study the factors that influence purchase decisions and the use of products. We will discuss in details about some important topics, like: Types of Consumers, Role of Consumer Behavior in Loyalty, Model of Consumer Behavior, Steps of Decision-Making Process, How to Reduce Cognitive Dissonance, Factors Influencing Consumer Behavior, Role of Consumer Behavior & Value Drivers.