The term 'Barrel to Tap' can be summarized as a three-letter word, 'KEG'. A KEG is a cylindrical container made of metal, wood, or plastic, which is used to store and dispense beer, wine, or other alcoholic beverages. It is often tapped with a spigot or tap, allowing the contents to be poured out. Kegs are commonly used in bars, pubs, and restaurants, and are also popular for home brewing and parties.