Brewer's need is an important term in the beer-making process. Hops, YEAST, CASK, malt, OAST, BARLEY, and teabag are all essential components of the brewing process. Hops are a flower used to add flavor and bitterness to beer. YEAST is a microorganism that helps convert sugars into alcohol. CASK is a container used to store and serve beer. Malt is a grain that is germinated and dried to create a sweet flavor. OAST is a kiln used to dry malt. BARLEY is a cereal grain used to make beer. Teabag is a bag of hops used to add flavor to beer.