Answer
Guinness originally brewed ale, a top-fermented beer made with malted barley, water, hops, and yeast. It was first produced in the 18th century by Arthur Guinness in Dublin, Ireland. Over time, Guinness expanded its range to include other beer styles such as stouts and lagers, but the brewery's flagship product remains its iconic Guinness Draught Stout, which is known for its dark color, creamy head, and rich, malty flavor.