The answer to 'shingles damaged' is that common causes include severe weather, age, poor installation, and lack of maintenance. Symptoms include curling, cracking, missing granules, or leaks. Solutions can range from minor repairs to a full roof replacement, depending on the extent of the damage.
If the damage is minor, like a few cracked or missing shingles, a DIY approach may be possible with the right tools and skills. However, for more extensive damage or if you're unsure, it's best to call a professional roofing contractor. They can properly assess the situation, provide an estimate, and safely make the necessary repairs or replacement.