The Night's Watch recognizes you as a born leader. You supervise a small group of your brothers in arms in their daily duties.
In Catan: Game of Thrones you need to make sure the Wall's defenses are maintained. We must ensure the continuous supply of resources through outposts and fortresses and allow the survival of the Night's Watch. By assigning your brothers as guards on the Wall, you prevent wildlings from entering the Don.
But beware, the wildlings are gathering, always looking for a breach in the Wall. Will your guards be able to hold them off?