This exposed nail could cause you water damage to your decking as well as your attic or soffit. Do you have any of these on your roof? After an inspection of this roof, we found many nail pops and their respective holes that caused water to penetrate the decking and cause water damage in the attic. We recommended partially replacing the decking and removing other nail pops and sealing them to prevent further damage.
Give us a call at 877-766-3910 for roofing assistance. We're happy to help!