Be a fan of the characters

Think of the players’ characters as protagonists in a story you might see on TV. Cheer for their victories and lament their defeats. You’re not here to push them in any particular direction, merely to participate in fiction that features them and their action.

Begin and end with the fiction

Everything you and the players do in Dungeon World comes from and leads to fictional events. When the players make a move, they take a fictional action to trigger it, apply the rules, and get a fictional effect. When you make a move it always comes from the fiction.