An ice scraper is used on a vehicle to remove ice and snow from the windows, mirrors, and other surfaces. There are several reasons why someone would use an ice scraper on a vehicle:

To improve visibility: Removing ice and snow from the windows and mirrors is essential for improving visibility and making driving safer in winter weather.
To clear the way for safe driving: Clearing ice and snow from the vehicle's surfaces allows for a clearer view of the road ahead and helps to prevent accidents.
To make getting into the vehicle easier: Clearing ice and snow from the vehicle's windows, doors, and handles can make it easier to get into the vehicle in really cold and harsh weather conditions.

Overall, using an ice scraper is a necessary part of winter driving and vehicle maintenance, helping to keep the vehicle and its occupants safe, and allowing for safe and comfortable driving in winter weather.