The answer to 'how to repair roof repair' is to first inspect the roof for any damaged or missing shingles, leaks, or other issues. Depending on the extent of the damage, you may be able to make minor repairs yourself, but for more significant issues, it's best to call a professional roofing contractor.
For minor repairs, start by cleaning the area around the damaged shingle and removing any loose nails or debris. Apply a roofing sealant or adhesive to the underside of the new shingle, then press it firmly into place. Secure the shingle with roofing nails, making sure they are flush with the surface. If you have multiple damaged shingles, repeat this process until all the repairs are complete.