What job does the lord do in a castle?

In a castle, the lord serves as the primary authority and owner of the estate, overseeing its management and the welfare of its inhabitants. He is responsible for maintaining Law and Order, administering justice, and collecting taxes or tributes from the peasants and vassals. Additionally, the lord often leads military efforts to defend the castle and its lands, while also hosting feasts and gatherings to demonstrate wealth and power. Overall, he plays a crucial role in the feudal system, balancing responsibilities towards his subjects with his own interests.