Keyless entry is a technology that allows users to unlock and start their vehicles without using a traditional key. Instead, it typically relies on a key fob or a smartphone app that communicates wirelessly with the car. When the user approaches the vehicle, the system detects the fob or app and automatically unlocks the doors, making it convenient for drivers. This system often includes additional features, such as push-button ignition, which allows the driver to start the engine with the press of a button. Keyless entry enhances security by using encrypted signals, making it harder for thieves to gain unauthorized access to the vehicle.