The answer to 'why is my roof hail damage' is that your roof has been damaged by hail. Hail is a type of severe weather that can cause significant damage to roofs, siding, and other exterior parts of your home. Hail forms when strong updrafts of air carry water droplets high into the atmosphere where they freeze into ice pellets.
Hail damage on roofs can appear as dents, cracks, or holes in the roofing material, as well as missing shingles or tiles. You may also notice damage to the flashing, vents, or other roof components. If the damage is severe enough, it can lead to leaks and further damage to your home's interior.