Orders are a resource used to issue commands across your nation. Instead of moving every unit every turn, as is traditional in 4X games, each unit can be moved as many times as desired, until the player runs out of Orders. There are many other ways to spend this resource: Combat, Construction, Events, Diplomacy, and so on.
Legitimacy
Each ruler must prove that they are worthy of the throne. As you accomplish Ambitions, finish Wonders, and gain renown (as “the Wise” or “the Avenger” or “the Peacemaker”), your Legitimacy increases, granting additional Orders each year and improving your standing with the people.