The term "feudal" refers to a social and economic system that dominated medieval Europe, where land was the main source of wealth and power. In this system, a king would grant large pieces of land, called fiefs, to nobles or lords in exchange for loyalty and military service. These lords would then allow vassals to work the land in return for protection and a share of the crops. At the bottom of the feudal hierarchy were the serfs, who were often bound to the land and worked for the lords. This system created a structured society where everyone had specific roles and responsibilities, ensuring stability during a time of frequent conflicts and invasions.