Meade Hall

The Meade Hall is the central activity point in any viking village. As such, the size of your Meade Hall directly allows/limits the number of vikings available in Berk. To get buildings like Windmills, Huts and other viking homes, you must upgrade the Meade Hall. Building these will increase the amount of vikings you have but there is a limit of vikings that you can have in the village, based on the Meade hall itself.

Acquisition
You can't have something for nothing. In order to upgrade to each level, you must have near your max of wood, along with top-tier trained dragons. Why bother upgrading? So you can buy more vikings, place more dragons, and generally get more stuff.