Biometric systems verify identity using unique physical or behavioral characteristics, such as fingerprints, retina scans, or facial recognition. These systems capture and analyze specific traits to authenticate individuals, providing a higher security level than traditional passwords or PINs. Biometric verification is increasingly used in various applications, including access control, financial transactions, and mobile device security. Its reliance on unique biological attributes makes it challenging for unauthorized individuals to impersonate legitimate users, enhancing security measures.