1.   Just like a liquid marinade, the longer you let the spices sit the more flavor the meat will have.

2.   Liquid marinades are a common preparation for grilling meats, but a nice rub can also boost flavor with little hassle.

3.   The flavor of a spice rub can add something different than a typical liquid marinade.

4.   The moisture of the meat will soak in the dry spices faster than a liquid marinade, and the set time is less.