Biometrics is a security measure that uses unique physiological traits, such as fingerprints, facial recognition, or iris patterns, to verify an individual's identity. This method enhances security by ensuring that only authorized users have access to systems or facilities. Biometric authentication is increasingly common in devices like smartphones and security systems, where convenience and accuracy are essential. As technology advances, biometrics continues to evolve, offering higher levels of security while also considering user privacy concerns.