Full coverage foundation is a makeup product that is applied to your skin, usually after some type of conditioning with lotion or primer, to cover any minor imperfections. With certain application routines, even larger imperfections can be covered. Basically, foundation turns a pretty face into a more beautiful face. And yes, you do have a pretty face already! Now that we have the basic answer to the question, “What is Full Coverage Foundation,” we can move on to the good stuff.