Biometric security is a technology that uses unique physical characteristics of individuals to verify their identity. Common biometric traits include fingerprints, facial recognition, iris patterns, and voice recognition. This method is often used in devices like smartphones and security systems to enhance safety and prevent unauthorized access. The main advantage of biometric security is that it relies on traits that are difficult to replicate or steal, making it more secure than traditional passwords or PINs. However, concerns about privacy and data protection arise, as biometric data must be stored securely to prevent misuse or hacking.