Tire pressure refers to the amount of air inside a vehicle's tires, measured in units like pounds per square inch (PSI). Proper tire pressure is crucial for safe driving, as it affects vehicle handling, fuel efficiency, and tire wear. Under-inflated tires can lead to poor traction and increased risk of blowouts, while over-inflated tires can cause a harsh ride and uneven wear. To maintain optimal tire pressure, it's important to check it regularly, especially before long trips or changes in weather. Most vehicles have a recommended tire pressure listed in the owner's manual or on a sticker inside the driver's door. Keeping tires properly inflated ensures better performance and longevity for the vehicle.