A tyre pump or inflator is an essential tool for any vehicle owner. You might use a tyre pump or inflator:

To maintain proper tyre pressure: Keeping the correct tyre pressure is crucial for the safety, performance, and longevity of the tyres. A tyre pump or inflator can be used to quickly and easily add air to the tyres, ensuring that they are always at the correct pressure.
To save money: Underinflated tyres can result in reduced fuel efficiency, which can be expensive over time. By using a tyre pump or inflator to maintain proper tyre pressure, a vehicle owner can improve their fuel efficiency and save money.
To improve handling: Proper tyre pressure can also improve the handling and stability of the vehicle, making it safer to drive.
To be prepared for emergencies: A tyre pump or inflator can be a lifesaver in case of a flat tyre on the side of the road. By having a tyre pump or inflator in the vehicle, the driver can quickly inflate the tyre and get back on the road.

In conclusion, using a tyre pump or inflator can help maintain proper tyre pressure, save money, improve handling, and be prepared for emergencies.