A digital smart door lock is an electronic locking system that replaces traditional keys with keyless entry methods like PIN codes, fingerprints, smartphone apps, or RFID cards, offering enhanced security and convenience. These locks often feature remote control via Wi-Fi/Bluetooth, auto-locking, temporary access for guests, and integration with smart home systems (e.g., Alexa, Google Home). They provide benefits like no physical keys to lose, real-time access logs, and tamper alerts, while some models include backup power or mechanical key overrides for emergencies. Ideal for modern homes, they combine advanced technology with user-friendly access control.