One in eight American adults eats pizza on any given day and 350 slices of pizza are eaten each second. Americans eat a lot of pizza so the competition is hot. In order to get new and returning customers, pizzerias have stepped up their social media. We used our Fan Grader to run a test to see which pizza chain is the most engaging on Facebook. Check out our analysis of the pizza giants, Papa John’s, Domino’s, and Pizza Hut to see who came out on top.