Cask ale is a type of beer that is conditioned and served from a cask without additional nitrogen or carbon dioxide pressure. It is typically unfiltered and unpasteurized, allowing for natural carbonation through fermentation. This traditional method enhances the beer's flavor and aroma, making it a favorite among craft beer enthusiasts. Cask ale is often served at cellar temperature, which is slightly warmer than typical draft beer. It is commonly found in pubs, especially in the United Kingdom, where it is a key part of the CAMRA (Campaign for Real Ale) movement, promoting traditional brewing methods and quality ales.