Amidst the massive and complicated conflicts of mortals and daemons, we have the Ogres. The Ogre Kingdoms are simple, they like to fight and eat. As long as they are fighting and eating, they appease their god, the Great Maw.
How to feed The Great Maw
Stores of meat let Ogre armies sacrifice some of their food to the Great Maw for a temporary boon, like increased melee attack, larger movement range, or faster recruitment. To activate a boon, select the Offer to the Great Maw button to the right of the unit recruitment button, select the desired boon, and click make an offer.
The Great Maw
The Great Maw is the deity of the Ogres, both out of respect and fear. The Great Maw was the same beast that nearly wiped out the Ogres as an entire race. So now, out of this fear and respect, they give continuous offerings to it, for a sliver of its monstrous power. In-game, the Great Mawcan easily be located fromthe map of the Ogre Kingdom in the campaign.
For more on Total War: Warhammer 3 check out Total War: Warhammer 3 Legion of Chaos Roster or How to unlock Boris Ursus in Total War: Warhammer 3 here on Pro Game Guides.