Biometric authentication is a method of verifying a person's identity based on unique physical or behavioral characteristics, such as fingerprints, facial features, iris patterns, or voice patterns. This technology is increasingly being used in various applications, such as access control, mobile devices, and financial transactions, as it provides a more secure and convenient way to authenticate individuals compared to traditional methods like passwords or PINs. Biometric authentication systems capture and analyze these unique characteristics to confirm a person's identity, offering a high level of security and accuracy in verifying individuals.