By Melanie Webber, Director, MWWine School - You live in Paso, surrounded by vineyards and wineries, so acid and tannin are probably not alien words. But, they are often misunderstood. Understanding acid and tannin is key to not only assessing balance and quality in wine, but also to successful food and wine pairing - and, perhaps most importantly, to enhancing your enjoyment of the wine. Acidity: Wine Refresher One could write a dissertation about acid in wine.