Seems like there is a lot of confusion around what control groups are and why you should care about them, and I’m hoping this post helps to clear some of that up!  But before I lose you in the details, here is why you should care about this topic: If you are not using control groups, then your customer campaign results are always suspect.

Why Use Control Groups?

Control Group Benefits

Culture of Control (Groups)

Are You in Control?

Poison Control