We're going to get super nerdy with this one! Most wine drinkers won't look at the pH of a wine, but it's super important to winemakers. Typically, the pH level of a wine ranges from 3 to 4, with a lower pH number indicating higher acid levels, while a high pH means lower acidity. Acidity provides some of the backbone needed for long-term aging, so high acid wines are more likely to improve with time than those with lesser amounts. Acid can also affect the flavor profile of the wine: a wine with high acid will usually taste crisper and more tart on the palate. A low-acid wine will feel smoother and rounder on the palate.