Each player has the responsibility of keeping the course in a similar condition to how they found it. Proper golf etiquette dictates that you repair any damage to the putting surface made by the impact of the ball. We even suggest that each player fix their ball mark plus one other. This helps assure that the conditions for putting remain optimal and the leads to a better experience for all. Please remember:
Every ball mark leaves a scar
An unrepaired ball mark, even after healing, retains a cavity shape that impairs ball roll
An improperly used repair tool extends the time needed for recovery ant the mark leaves a larger scare