Using this rub will add an outer coating of concentrated herbs and spices to your fish before cooking or grilling. It flavors the outside of the fish, and if left on long enough, it will permeate the outer layers, adding flavor to the inside as well. In general, spice rubs not only add flavor, but also seal in moisture, ensuring a flavorful, juicy entrée. This Greek rub is excellent rubbed on mild, white fish before broiling or grilling, or add it to oil for a dipping sauce.