Free-standing air fresheners are often used in vehicles to enhance the air quality and fragrance inside the car. There are a number of reasons why someone might choose to use a free-standing air freshener in their vehicle:

To combat unpleasant odours: Over time, cars can develop unpleasant odours from things like food, smoke, or pets. An air freshener can help to mask or eliminate these.
To create a pleasant atmosphere: An air freshener can be used to create a pleasant and relaxing atmosphere inside the car. This can help to make driving more enjoyable, especially on long trips.
To refresh the air: An air freshener can help to refresh the air inside the car, which can be particularly helpful during hot and humid weather.
As a personal touch: Some people like to use air fresheners to personalize their car and make it feel like their own.

Overall, using a free-standing air freshener in a vehicle can be a simple and effective way to enhance the air quality and atmosphere inside the car.