Applied psychology is the use of psychological theories, principles, and methods to solve practical problems encountered in everyday lives. It has a wide range of applications, from improving the effectiveness of educational processes and increasing worker productivity to health promotion and prevention in the community. Applied psychology can also be used to help individuals, families, and organizations function more effectively. It is an important tool for understanding social and organizational behaviour, which can help improve decision-making processes, increase organizational productivity, and reduce conflict in the workplace. Applied psychology has the potential to create positive changes in societies, as it provides a practical approach to address a variety of issues, from mental health to economic development.