Tire pressure refers to the amount of air inside a vehicle's tires, measured in pounds per square inch (PSI). Proper tire pressure is essential for safe driving, as it affects vehicle handling, fuel efficiency, and tire wear. Each vehicle has a recommended tire pressure, which can usually be found on a sticker inside the driver's door or in the owner's manual. Maintaining the correct tire pressure helps ensure optimal performance and safety. Under-inflated tires can lead to poor traction and increased fuel consumption, while over-inflated tires may cause a harsh ride and uneven wear. Regularly checking tire pressure is an important part of vehicle maintenance.