Wikipedia
Criteo
Criteo is a personalized retargeting company that works with Internet retailers to serve personalized online display advertisements to consumers that have previously visited the advertiser's website. The company currently operates in a total of 30 markets around the world and is headquartered in Paris, France. On April 7, 2011, Criteo announced that it hired Greg Coleman as president. Previously, Coleman served as president and chief revenue officer of The Huffington Post and executive vice president of global sales for Yahoo!.
Criteo enables online businesses to follow up visitors who have left their website without making a purchase using personalized banners which aim to drive potential customers back to the business website.