The Great Hall allows you to view your Hero Gear and Hero Buffs. Hero Buffs are where you find out the stats of your hero that are used in battle calculations.
Finding Hero Buffs[]
How do you find it? This is a common question. It's not hidden, but easily overlooked.
Go to your Great Hall.
Click on the Heroes tab.
Click on the Equip button.
Click on the Details button.
Now you see Buffs:
And you see Debuffs: