Wines are classified according to the grape varieties used to produce them. The term "terroir" is used to refer to the grape variety and characteristics of a vineyard or region, including the climate and soil composition. These factors can have a significant impact on the wine's flavor profile. The dominant wine types are red wines and white wines. Each of these wine types has a number of popular varietals.
Red wines are fermented with the grape skins intact, which imparts both color and tannins to the wine. These tannins add the astringent, slightly bitter flavor that characterizes many red wines.
Common grape varietals for red wines include:
White wine is produced by fermenting grapes without their skins. This generally yields light, fresh, fruity flavors. White wine grape varietals include the following: