Google's email program, gmail, includes one line advertisements featured at the top of the window where email messages are displayed.
The other day I got an ad encouraging me to support the National Republican Senatorial Committee in their efforts to elect Republicans to the Senate.
I like politics, so this ad seems appropriate. In fact, I had just linked the NRSC website in a blog post a few days earlier, so it seems like a perfect fit, right?
The only problem is that in the post I was critical of Republicans for spending too much money, and I essentially called the head of the NRSC stupid.
The things that google can do to target ads is nothing short of amazing, but it's obvious it remains an inexact science.