Rubs are used to balance between salty, sweet, savory, and sour. They are a must have for the barbecue aficionado to add rich flavor to meats. They enhance the taste of meat without smothering it like a sauce. Their flavors tend to be bold so they do not fade during prolongs "low and slow" cooking times. They almost always contain some type of sugar like crystalized honey & maple, brown sugar etc. that caramelize to hold in the meat's juices and add texture to every bite.