From Allstate: Make sure to check out your roofs, gutters, siding, screens and windows for damage. Contact your insurance company if you think you have have hail damage asap and request an insurance adjuster inspect for damages. Hail damage reduces the lifespan of your roof.
If you are selling your home, it can also cause a problem. A home inpsector will note this damage and the buyer will likely want it repaired before purchase. If there is a lot of damage on all sides of the roof, it will likely mean a new roof. If only one side of the roof, then that one side will likely be replaced. No matter what, make sure you have hail damaged checked out by your insurance company.