Power door locks are an electronic locking system used in vehicles to secure doors automatically. They allow drivers and passengers to lock or unlock all doors simultaneously with the push of a button, typically located on the car's key fob or inside the vehicle. This system enhances convenience and safety, as it eliminates the need to manually lock each door. Many modern vehicles also feature keyless entry systems, which enable users to unlock doors without inserting a key, further streamlining the process of entering and exiting the vehicle.