Bartending involves preparing, mixing, and serving alcoholic beverages to customers. A bartender, also known as a barkeeper, barman, barmaid, or barperson, serves alcoholic drinks behind the bar in a licensed establishment. Key bartending techniques include shaking cocktails to properly mix ingredients, straining shaken drinks, stirring to prevent excessive dilution, layering multiple liqueurs, flaming some drinks to enhance flavors, and flairing by flipping bottles for entertainment.