The technology used for facial recognition typically involves machine learning and computer vision techniques. Facial recognition systems analyze facial features from images or video streams and compare them to databases of known faces. This technology utilizes algorithms that can detect faces in various lighting conditions and angles. Once a face is detected, feature extraction algorithms identify unique characteristics, which are then matched against stored data to confirm identity. Applications include security systems, social media tagging, and mobile device unlocking, making facial recognition increasingly prevalent in daily life.