Face Unlock is a biometric security feature that allows users to unlock their devices by recognizing their facial features. This technology uses a front-facing camera and advanced algorithms to analyze the unique characteristics of a person's face, providing a quick and convenient way to access smartphones and tablets. To enhance security, many Face Unlock systems incorporate additional measures, such as infrared sensors or depth mapping, to ensure that the system can differentiate between a real face and a photograph. This helps protect user data from unauthorized access while maintaining ease of use.