It's sauce. Gravy is for 3rd generation know nothings!
Yes, it's sauce!
By the way, I am loathe to buy a pizza. Despite the fact that my wife is a Mississippi/Texas white women, she did learn to make pizza from my mother. She learned well. However, because she seldom will do anything (and I mean anything) for me anymore, from time to time I am forced to buy a pizza.
Which do ya'll consider the best national pizza chain for pizza? I think Papa John's is pretty good.