Track Adsense Referral using channels

Finally Adsense give publishers the ability to track referral units. You can track both text and button referral formats and see which referral unit performs the best. This is very hand for publishers who run Adsense Referral units on multiple sites (Compare Site A vs Site B).

You will not be able to track your referral units unless you add channels and add updated referral codes on your site / page.