Ad-stalking

The was Google follows your browsing habits and then displays ads based on the sites you have been to.

Guy A- dude why do you constantly have Banana Republic ads on all of the sites you go to?
Guy B- I Googled Banana Republic the other day and ever since then its been Ad-stalking me.

ad stalking

Being bombarded with ads for things you recently looked up online.

Person1: Dude I googled santorum and now I'm constantly seeing ads for gay porn, eww.
Person 2: Lol ad stalking claims another victim.