Clemency refers to the act of showing mercy or leniency towards an individual convicted of a crime, often resulting in a reduction of punishment or sentence. Commutation is a specific form of clemency that involves changing a convicted person's sentence to a less severe one, such as reducing a death sentence to life imprisonment. Both clemency and commutation are crucial aspects of the justice system, as they provide a mechanism for reconsidering sentences based on various factors like rehabilitation, evidence of innocence, or changing social norms.