Personality psychology is the branch of psychology that studies individual differences in personality traits and how they influence behavior. It seeks to understand what makes each person unique, exploring aspects like traits, motivation, and emotions. Researchers often use various methods, including questionnaires and interviews, to assess personality and its impact on life choices and relationships. This field also examines how personality develops over time, influenced by factors such as genetics, environment, and culture. By understanding personality, psychologists can help individuals improve their self-awareness and interpersonal skills, leading to better mental health and more fulfilling lives.