Traditional beer is a fermented beverage made primarily from four key ingredients: water, malted grains (usually barley), hops, and yeast. The brewing process involves mashing the grains to extract sugars, boiling the mixture with hops for flavor, and fermenting it with yeast to produce alcohol. This age-old craft varies widely across cultures, resulting in diverse styles and flavors. Many regions have their own unique brewing traditions, often influenced by local ingredients and historical practices. For example, German lagers and Belgian ales showcase distinct characteristics, while cask ales from the UK emphasize traditional serving methods. Each style reflects the cultural heritage of its origin.