A tire rotation … well… rotates your tires. This causes the wear on your tires to be redistributed to other parts, which will extend the life of your tires. If you don’t rotate your tires then the wear on them will be centralized to one spot, forcing it to be replaced sooner. With centralized wear, your tires may even pop sooner so be sure to rotate your tires!
What’s the Point of a Tire Rotation?