The Transtheoretical Model of Behavior Change is a psychological framework that outlines the stages individuals go through when changing a behavior. It consists of five stages: Precontemplation, Contemplation, Preparation, Action, and Maintenance. This model helps to understand how people progress and what factors influence their readiness to change. Each stage represents a different level of awareness and commitment to change. For example, in the Precontemplation stage, individuals may not recognize the need for change, while in the Action stage, they actively implement new behaviors. This model is widely used in health promotion and therapy to facilitate effective behavior change.