Sweet potatoes are commonly seen labeled as yams, when in reality they are most likely sweet potatoes. Many years ago the U.S. government decided to label sweet potatoes by their color to make things easier. The creamy white flesh ones are labeled sweet potatoes and the orange fleshed ones are sometimes labeled yams.  The USDA requires that sweet potatoes labeled as yams also be labeled as sweet potatoes. Chances are likely that you are buying sweet potatoes regardless of what the label says. Are you still confused?