This lecture explores the theoretical foundations and follow-up practical applications of Virtual Reality Exposure Therapy (VRET) in modern psychotherapy. Rooted in classical exposure therapy and cognitive-behavioral principles, VRET leverages immersive virtual environments to treat anxiety disorders, phobias, and PTSD by providing controlled, realistic exposures to anxiety-provoking stimuli. The lecture will cover how VRET enhances therapeutic outcomes by offering a customizable, safe, and cost-efficient alternative to real-life exposure, while addressing its advantages, challenges, and future potential. Special attention will be given to its role in improving accessibility to therapy and advancing mental health treatment.