Biometric systems enhance security in technology by using unique physiological characteristics for identification, such as fingerprints, facial recognition, and iris scans. These systems provide a higher level of security compared to traditional methods like passwords, which can be forgotten or easily compromised. Biometrics offer seamless authentication experiences, making access quick and reliable. As these technologies evolve, they are increasingly adopted in various applications, including mobile devices, security systems, and financial services, thereby boosting security and reducing fraud.