Wine regions are specific geographical areas where grapes are cultivated for winemaking. These regions are often defined by their unique climate, soil types, and grape varieties, which contribute to the distinct flavors and characteristics of the wines produced. Notable wine regions include Bordeaux in France and Napa Valley in the United States, each known for their signature wines. The classification of wine regions can vary, with some regions being recognized for their quality through systems like the Appellation d'Origine Contrôlée (AOC) in France. Understanding wine regions helps consumers appreciate the diversity of wines and the influence of terroir on flavor profiles.