How is Facebook doing this? How??

This is insane. I very rarely use Facebook, but I've been using it the last few days and it's creepy as hell. I'm signed into it on chrome and when I looked up a product IN A FRESH incognito window and then closed it, went back to Facebook and it immediately showed me an ad for that exact product. Then just now I looked up Maserati, once again in a fresh incognito window, browsed their site, closed the window and …

back chrome doing facebook incognito privacy product window