The term 'Mafia Head' refers to two positions in the Mafia hierarchy: the CAPO and the DON. The CAPO is the head of a Mafia family and is responsible for overseeing the activities of the family's members. The DON is the leader of the entire Mafia organization and has ultimate authority over all decisions. Both the CAPO and the DON are powerful figures in the Mafia and have significant influence over the criminal underworld.