Criteo is a recommendation engine, and AutoRoll is a product designed using their open API. The idea is much like Amazon’s “If you like this book, you might also like these other ones…,” recommendations, with blog substituted for book. The idea is that by gathering and analyzing information on which blogs people are visiting, AutoRoll can recommend other blogs you might be interested in. If 50 people who like my blog also spend a lot of time at, say, Inside Tampa Bay Luxury Real Estate blog, then that blog will automatically begin appearing on my AutoRoll. Pretty neat. We will give it a try.