Wine blends are created by combining different types of grapes or wines to achieve a desired flavor profile. This process allows winemakers to balance various characteristics, such as acidity, sweetness, and tannins, resulting in a more complex and enjoyable wine. Common grape varieties used in blends include Cabernet Sauvignon, Merlot, and Syrah. Blending can occur before fermentation, during aging, or just before bottling. Each region has its own blending traditions, with famous examples like Bordeaux blends from France, which typically combine Cabernet Sauvignon and Merlot. These blends can enhance the overall quality and uniqueness of the wine.