Dry rubs are a blend of ground spices for spreading on foods to add flavor. Wet rubs are essentially marinades and differ by incorporating oils and often acids such as lemon juice or vinegar (see Marinate). Dry rubs like this one and jerk rub have some advantages over marinades. The spices add a more intense flavor while helping create a crusty texture.
Use your hands for rubs (hence the term). If you don't want to touch the food, you can put it in a zipper bag and add the rub. Toss the bag to coat the food inside and then rub it through the plastic.