A beer dispenser is a device used to serve beer from a keg or a container. It typically consists of a tap, a cooling system, and a pressurized gas system, which helps to maintain the beer's freshness and carbonation. Beer dispensers are commonly found in bars, restaurants, and at home for personal use. These dispensers come in various styles, including kegerators, which are refrigerators designed specifically for storing and dispensing kegs, and draft beer systems, which can be more complex and used in commercial settings. Proper maintenance and cleaning are essential to ensure the quality of the beer served.