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Power steering refers to a hydraulic or electric system in a vehicle that assists the driver in turning the wheels, making it easier to maneuver and control the car. The power steering system reduces the amount of effort required by the driver to turn the wheels, especially at low speeds or when parking. This system utilizes a pump which is driven by either the engine (in hydraulic systems) or an electric motor (in electric systems), that applies pressure to the steering gear or rack, providing the necessary assistance to turn the wheels. Power steering systems play a critical role in ensuring safe and easy driving, allowing for precise and smooth control of the vehicle's direction.