Facebook is trying to solve one of the most annoying problems with online advertisements

It happens all the time: You go on Amazon and buy something. And then in the following months you're bombarded with ads for that item you just bought, despite the fact that you now already own it. This is a huge problem for targeted ads, as they collect data on past behavior not future projections. I experienced this very problem when I bought an air conditioner. After making the purchase, I kept seeing ads for other air conditioners. All I could think was "Stupid advertisers! I don't need two o...