From the German word for 'storage', lager is a general term indicating beers such as pilsner, export and marzen which were usually stored for at least three weeks prior to being served. This style of beer is now the most commonly drunk worldwide: in the UK, it replaced traditional ales in around 1950 as being the most consumed beer in the country.
Although widely known for being light in colour, there are darker variations: in Germany, darker lagers are referred to as Dunkel lagers with darker ones still such as the Balltic Porters.