Developmental Theory is a framework that explains how individuals grow and change throughout their lives. It encompasses various stages of development, focusing on physical, cognitive, and emotional growth. Key theorists, such as Jean Piaget and Erik Erikson, have contributed to our understanding of how people evolve from infancy to adulthood, highlighting the importance of experiences and social interactions. This theory is often used in fields like psychology, education, and social work to inform practices and interventions. By understanding the different stages of development, professionals can better support individuals in achieving their full potential and addressing challenges they may face at various life stages.