Sour ale is a type of beer that is intentionally brewed to have a tart or sour flavor. This unique taste is achieved through various fermentation methods, often involving wild yeast strains like Brettanomyces and bacteria such as Lactobacillus or Pediococcus. These microorganisms produce lactic acid, which contributes to the sourness, making sour ales distinct from traditional beers. There are several styles of sour ale, including Berliner Weisse, Gose, and Flanders Red Ale. Each style has its own characteristics, ranging from light and refreshing to complex and fruity. Sour ales are often enjoyed by those looking for a different beer experience, appealing to both craft beer enthusiasts and casual drinkers alike.