Final answer:
To set your vehicle free from the snow, you can use sand or salt to gain traction or use traction mats to provide grip. Avoid excessive spinning of tires to prevent digging them deeper into the snow.
Step-by-step explanation:
If your vehicle became stuck in the snow, the fourth thing you should do to set it free is to use sand or salt to gain traction. Sprinkle sand or salt in front of and behind the tires to increase traction and help the tires grip the snow. This will make it easier for the tires to get enough traction to move the vehicle.
Alternatively, you can use traction mats or even floor mats or pieces of carpet to provide traction. Place them in front of the drive wheels and slowly drive onto them. The mats will provide a surface for the tires to grip, allowing the vehicle to move out of the snow.
It's important to note that when trying to get your vehicle unstuck from the snow, avoid spinning the tires excessively as it can worsen the situation by digging the tires deeper into the snow.