Whiskey is a type of distilled alcoholic beverage made from fermented grain mash. The grains used in the mash can vary, but common types include barley, corn, rye, and wheat. The fermentation process for whiskey production typically involves the use of yeast to convert the sugars in the grain mash into alcohol.

There are many different types of whiskey, including Scotch, Irish whiskey, Bourbon, Tennessee whiskey, and Canadian whiskey, among others. Each type of whiskey has its own distinct production methods and flavor profiles, but all are characterized by their rich, complex flavors and aromas.

Scotch is a type of whiskey that is made in Scotland and must be aged in oak barrels for at least three years. Scotch whiskey is typically made from malted barley, and it is known for its smoky, peaty flavor.

Irish whiskey is made in Ireland and must be aged in oak barrels for at least three years. Irish whiskey is typically made from a blend of barley, corn, and wheat, and it has a smooth, mellow flavor.

Bourbon is a type of American whiskey that is made from at least 51% corn and aged in new, charred oak barrels. Bourbon has a sweet, rich flavor with notes of vanilla and caramel.

Tennessee whiskey is a type of American whiskey that is similar to Bourbon, but it is made in Tennessee and is typically filtered through a layer of sugar maple charcoal before being aged in oak barrels. Tennessee whiskey has a smooth, mellow flavor with a subtle sweetness.

Canadian whiskey is made in Canada and is typically made from a blend of grains, including corn, rye, wheat, and barley. Canadian whiskey has a smooth, light flavor and is often used as a mixer in cocktails.

In general, whiskey is enjoyed neat, on the rocks, or mixed in cocktails. It is also often used as a cooking ingredient, adding depth and flavor to a variety of dishes.