How is the administration of the state carried out in the estate monarchy?

How is the administration of the state carried out in the estate monarchy? What is the purpose of the estate-representative body in such states?

Under the estate monarchy, the power of the king was divided with representatives of various estates, as a rule, these estates were the townspeople, nobles, and the clergy. Representatives of these estates could take part in the drafting of the laws of the state. Then the estate-representative assemblies gathered, where representatives of the estates gathered. Gradually, the number of representatives of the nobility at such meetings became more and more, power began to be distributed unevenly.