Mileage refers to the distance traveled, typically measured in miles or kilometers. It is commonly used to describe how far a vehicle has traveled, often recorded on a vehicle's odometer. This measurement helps drivers keep track of their travel for maintenance, fuel efficiency, and trip planning. In addition to vehicles, mileage can also apply to other forms of transportation, such as bicycles or airplanes. For example, airlines often use mileage to determine frequent flyer rewards, while bicyclists may track their mileage to monitor fitness progress. Understanding mileage is essential for effective travel planning and vehicle maintenance.