An automatic gearbox is a type of transmission system in vehicles that automatically changes the gear ratios as the vehicle moves. Unlike manual gearboxes, which require the driver to shift gears manually, automatic gearboxes allow for smoother acceleration and easier driving, especially in stop-and-go traffic. These gearboxes use a complex system of hydraulics and sensors to determine the optimal gear for the vehicle's speed and load. Common types of automatic gearboxes include continuously variable transmissions (CVTs) and dual-clutch transmissions (DCTs), each offering different driving experiences and efficiencies.