This document discusses various types of psychotherapy. It describes psychotherapy as a type of talk therapy used to treat mental illnesses and emotional difficulties. Some key types discussed include psychoanalytic therapy developed by Sigmund Freud which focuses on the unconscious mind, Adlerian therapy created by Alfred Adler which aims to help people overcome feelings of inferiority, and cognitive behavioral therapy developed by Aaron Beck which focuses on challenging unhelpful thoughts and behaviors. The document outlines several founders and principles of different psychotherapy approaches and their advantages in helping clients.