I am an Arizona native with 30 years experience primarily in bankruptcy law. Having served the Maricopa County Justice Courts as a Judge Pro Tem from 2001 through 2008, I am a current member of the Arizona Bar in good standing and admitted to practice law in all state and federal courts.
Golf divot tools are a useful item of golfing lit that is used to repair the scuffs in the grass caused when gofers brush it with their clubs or when golf balls land on the putting green. Keeping the grass in good condition is important, but it is not just a job for the greenkeepers.
When the turf is back in the ground, tamp down with your foot, and you're done. Repairing divots is not always a necessity; with certain types of turfgrasses, at certain times of the year, repairing the divot won't make any difference, good or bad, to the health of the golf course.