They crush the grains so that they can be put into a mash tun.After a sparging time the wort,that is the water that the grains were steeped in,is then boiled for about 60 minutes.In this 60 minutes we add hops,or in Skyrims place juniper berry's.
After a few weeks of fermentation this sweet mixture becomes Ale.
The same thing can be done with honey,in a slighty differant process,to make mead or even wine.
To me it is clear that making Ale,mead or wine makes sence in a world such as Skyrim.
You can't trust water to be clean and drinkable,but however nothing can servive the brewing proccess of the fermented goodies ale,beer,wine and mead.
This is why it was a staple drink way back when.Err I mean in Skyrim.