If you use the Internet, you've experience ad tracking and ad targeting. That's when an ad for a product or site you've looked at follows you around from site to site.
A lot of people find this creepy and there are ways to stop it. However, for this year's Super Bowl, Facebook is taking ad targeting to a whole new level.
Last year, Facebook let advertisers target users, "based on their likes, profiles and demographic information," which is fairly standard. This year, Facebook is going to watch what you post about the Super Bowl and serve you targeted ads in real time based on what you say.
So, if you comment on how much you're enjoying the food at your party, the next ad you see might be for a food snack brand. I'm not sure I like that.