The main application of facial recognition technology lies in identifying and verifying individuals based on their facial features. This technology is widely used in security systems for surveillance and access control, enabling real-time identification of persons in crowds or restricted areas. Facial recognition also finds applications in various sectors such as retail for customer analytics, smartphones for user authentication, and social media for tagging users in photos. While enhancing convenience and security, it raises privacy concerns, prompting discussions about ethical use and regulation.