Forgiveness is the act of pardoning or being merciful for a mistake, error, offense, or sin. It involves letting go of resentment and anger towards someone who has done something wrong, and instead choosing to show compassion, understanding, and kindness. Forgiveness can be given by both the person who was harmed as well as the one who caused the harm. It is an important part of maintaining healthy relationships and promoting peace and reconciliation between individuals or groups.