wired.com – Molly McHugh
Maybe you were shopping for a new tent recently. You clicked around REI’s site, did an obligatory Craigslist search. Eventually, you wound up on Amazon, because everyone winds up on Amazon. Perhaps you added a few tents to your Wish List. Then you left that part of the Internet, and surfed somewhere else. Facebook, probably. Tumblr, maybe. WIRED.com, definitely! And suddenly, you noticed one or two or all of these sites trying to sell you a tent you’d just been perusing. Then you went to Facebook and saw another tent right there in the middle of your News Feed.