Power steering fluid is a specialized hydraulic fluid used in vehicles to assist with steering. It helps reduce the effort needed to turn the steering wheel, making driving easier and more comfortable. This fluid is essential for the proper functioning of the power steering system, which can be either hydraulic or electric. The fluid circulates through the power steering pump and the steering gear, allowing for smooth and responsive steering. Regularly checking and maintaining the correct level of power steering fluid is important to prevent steering issues and ensure the longevity of the system.