Roquefort is a French blue cheese that is made from the milk of sheep. It is produced in the region of Roquefort-sur-Soulzon in southern France. The cheese is known for its distinctive blue-green veins, creamy texture, and strong, tangy flavor. Roquefort has a protected designation of origin (PDO) status, meaning that it must be made according to specific methods in the designated region to be labeled as Roquefort cheese.