In seemingly direct contrast to ale yeast, the yeast required to make lager has a lower alcohol tolerance reacts to cooler temperatures and settles at the bottom of the beer after fermentation. Naturally, this process is known as “bottom fermentation”. The fact that lager yeast responds to cooler temperatures enabled certain European countries to ferment it in caves, which is one theory behind why this type of beer became so popular in the first place. In general, lagers are light and refreshing, though, in this day in age, the full spectrum is covered. Hence, if dark and strong is your thing, you can still find a lager to suit your desires.