A tire pressure gauge is a tool used to measure the air pressure inside a vehicle's tires. Maintaining the correct tire pressure is essential for safety, fuel efficiency, and tire longevity. Most gauges display pressure in pounds per square inch (PSI), which helps drivers ensure their tires are properly inflated. There are different types of tire pressure gauges, including digital and analog models. Digital gauges provide a numerical readout, while analog gauges use a dial to indicate pressure levels. Regularly checking tire pressure with a gauge can help prevent issues like uneven tire wear and blowouts, contributing to a safer driving experience.