Ork Resource, or WAAAGH!, is a special type of resource that is only available to the Orks. Ork Resource determines the limit of the player's Squad Cap, and the types of structures that can be built.
Ork Resource can be built up through the use of WAAAGH! Banners.
The amount of WAAAGH! that a player has will depend on the amount of banners they have and the amount of units they have on the battlefield.