Lager (German: storage) is a type of beer that is brewed using bottom-fermenting yeast at lower temperatures and for longer durations rather than those typically used to brew ales. In German, the term “lager” refers to storing a beer at cool temperatures and does not necessarily imply bottom-fermentation. Pilsner, Bock, Dortmunder Export and Märzen are all styles of lager.
Pale lager is the most widely-consumed and commercially available style of beer in the world. There are also dark lagers, such as Dunkel and Schwarzbier.