Biometric technology refers to the use of unique physical or behavioral characteristics to identify individuals. Common examples include fingerprint scanning, facial recognition, and iris recognition. This technology is often used for security purposes, such as unlocking smartphones or accessing secure facilities. The main advantage of biometric technology is its ability to provide a high level of security, as it is difficult to replicate someone's unique traits. However, concerns about privacy and data protection have arisen, leading to discussions about the ethical implications of using biometrics in various applications, including law enforcement and personal devices.