An odometer reading is a measurement that indicates the total distance a vehicle, such as a car or truck, has traveled. This information is displayed on the vehicle's dashboard and is essential for tracking mileage for maintenance, fuel efficiency, and resale value. Odometers can be mechanical or digital, and they typically reset to zero when a vehicle is manufactured. Regularly checking the odometer reading helps owners keep track of when to perform routine services, like oil changes or tire rotations, ensuring the vehicle remains in good condition.