Facial recognition systems are technology tools that identify or verify a person's identity by analyzing their facial features. These systems use algorithms to compare a person's facial data against a database of known faces, allowing for applications in security, law enforcement, and personal devices. The process typically involves capturing an image of a face, detecting key facial landmarks, and creating a unique facial signature. This technology is often used in smartphones, surveillance cameras, and social media platforms to enhance user experience and improve safety measures.