Campaign movement range: +15% for own armies starting their turn in this region
Income from post-battle loot: +3%
Income from raiding: +2%
Ambush success chance: +10%
Raidin' Stashes is a Greenskins infrastructure building in Total War: Warhammer. The Badlands are... well, let's just say they're named appropriately. Therefore, when you've got lots of loot you need somewhere safe to stash it.