A tire alignment is the adjustment of a car's suspension system, which connects the vehicle to its wheels. A proper tire alignment will ensure the tires point in the correct direction, and that they are perpendicular to the ground and parallel to each other. This helps to reduce wear and tear on the tires, provides better fuel efficiency, improves handling, and prevents the vehicle from pulling to one side. It is important to have regular tire alignment to maximize the lifespan of the tires and ensure safe driving.