Also sometimes called A/B testing, split testing means that you run two different versions of an AdSense ad unit on your blog so that you can see which one performs best. You serve one version of the ad to one visitor, and then another version to the next visitor.

If you do this over a large number of visitors you’ll get a bit enough sample to be able to draw some conclusions about which ad design works best in that particular ad position.

How to Run a Split Test on Your AdSense Ads

Split testing sounds complicated but it is relatively simple to set up. In short, all it really involves is setting up a couple of channels within your AdSense account so that you can track the results and then inserting a little extra code around the AdSense code in your blog’s templates. Here’s how: