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 indicated on the vehicle's odometer. Mileage can also refer to the fuel efficiency of a vehicle, expressed as miles per gallon (MPG) or kilometers per liter (KPL). In everyday use, mileage helps people understand the distance between locations, plan trips, and estimate travel time. For example, when planning a road trip, knowing the mileage between cities can assist in determining how long the journey will take and how much fuel will be needed.