I started driving in Florida in my teens. While my mom paid the cost of car insurance, I paid for most other expenses with that car. For instance, I paid to register the car. In order to renew the car’s registration, I jotted down the odometer reading (total mileage). At the time, I simply followed instructions and didn’t obsess about why they wanted this information. I simply rushed to get in and out of the DMV as quickly as possible.
Eventually, I learned why they noted the mileage. They set the cost of renewing your registration to be proportional to the amount of wear-and-tear on the roads. The more you ‘damaged’ the roads, the higher the cost to register your vehicle. They calculated this fee from two numbers: the weight of your vehicle and the distance you drove it. The rationale? It should cost more to register a 2000 Suburban driven 25k miles than a 2023 Miata driven 2k miles.