Biometrics refers to the measurement and statistical analysis of people's unique physical and behavioral characteristics. Common biometric identifiers include fingerprints, facial recognition, iris patterns, and voice recognition. These traits are used for identification and access control, enhancing security in various applications. Biometric systems work by capturing a sample of a person's biometric data and comparing it to a stored template. If the data matches, access is granted. This technology is widely used in devices like smartphones and security systems, making it a popular choice for personal and organizational security measures.