A ball mark is a small depression that occurs when a golf ball lands on the green's lush grass. Busy golf courses can develop more than 1,000 of these cavities every day.

Ball marks that are not repaired or are repaired improperly will kill the grass and result in a uneven putting surface. Research showed that if a pitch mark is repaired max. after 15 mins, the green would repair itself within 48 hours. If the mark would be left without fixing for longer, it would take close to 2 weeks.