A vizier is a high-ranking political advisor or minister in certain historical Islamic states, particularly during the era of empires like the Safavid Empire. This position was crucial as the vizier often acted as the right-hand man to the ruler, overseeing the administration, military affairs, and state policies. In the context of the Safavid Empire, the role of the vizier was essential for managing the complexities of governance and implementing the shah's decrees.