Facial recognition is a technology that identifies or verifies a person by analyzing their facial features. It works by capturing an image of a face and comparing it to a database of known faces. This process involves detecting key facial landmarks, such as the distance between the eyes and the shape of the jawline. This technology is used in various applications, including security systems, smartphone unlocking, and social media tagging. Companies like Apple and Facebook utilize facial recognition to enhance user experience and improve safety measures. However, it also raises privacy concerns regarding data collection and surveillance.