I don’t log into my AdSense account as much as I once did, but recently when I decided to check out my stats I noticed that I had a minor issue with the AdSense scorecard. It was indicating a minor problem with my revenue optimization. The rating for that area dropped from 5 to 3, even though I hadn’t done anything with my ads recently.
Upon closer inspection I noticed the following message:
Displaying both text and image ads increases competition for ads to appear on your site, and may help you earn more.
After looking at my current ads I noticed that they were all set to text and image ads. I wasn’t sure what the above message was referring to, until I dug a little deeper