Lager originates from the German word lagern which means “to store” and refers to the method of storing it for several months in near-freezing temperatures. A lager is usually used to describe bottom-fermented brews of Dutch, German, and Czech styles. Ranges from sweet to bitter and pale to black. However, most are a pale to medium color, have high carbonation, and have a medium to high hop flavor. There are several strains of lager one of the more well-known is the pilsner or pilsener.
Stout is a dark beer made using roasted malts or roast barley. It is generally darker, fuller bodied, maltier, and hopier than other ales. Stout Ale originated in Ireland as a variant of porter beer.
Porter is a style of ale which has a malty aroma, hop bitterness, and a bittersweet chocolate flavor. It is generally strong and dark and brewed with soft rather than hard water.
Ale is an ancient word for a fermented alcoholic beverage obtained mostly from malted barley. Ale is different from other brews because it is a top fermenting ale so the yeast tends to ferment quicker, convert less sugar to alcohol, and produce more esters than the lager yeasts. This is what causes them to have their sweeter and fruitier taste. There are several different kinds of ale such as Old Ale, India Pale Ale, Mild Ale, Bitter Ale, Pale Ale, Brown Ale, Scotch Ale and Belgian Ale, Porter and Stout.
Pilsner or Pilsener
The pilsner style of beer was developed in Plzen (Pilsen in English), a city in what is now the Czech Republic. It is made with neutral and hard water and tend to be golden in colour having a dry, crisp, and somewhat bitter flavor. Pilsner stands out from the other lagers due to its more distinctive hop taste.
Strong Lager served as a warming beer in late winter, early spring, or autumn, depending upon the part of the world. Color varies. Classically served at not less than 48F.(source… Wikipedia)