Brendan Byrnes: That ties into the product personalization trend also. You see Google really effective at tailoring ads. If I'm looking for dress shoes online, they know to hit me with that ad. Facebook, much the same way, they know a ton about you.

What are some other companies that are doing this? They're not the only ones. What are some of the trends we're seeing with that?

Ann Mack: You're seeing more of the retailers serve up their circulars or coupons that are tailored toward your past purchasing behavior. It's this idea of predictive personalization -- serving up coupons, offers, circulars -- that are geared personally toward you, your past behaviors, your interests, your demographic, your social network, your location, and so on. 

Brendan Byrnes has no position in any stocks mentioned. The Motley Fool recommends and owns shares of Facebook and Google. Try any of our Foolish newsletter services free for 30 days. We Fools don't all hold the same opinions, but we all believe that considering a diverse range of insights makes us better investors. The Motley Fool has a disclosure policy.