New Third-party Ads For Google AdSense Publishers

Google AdSense introduced a new kind of ads, They call them "Expendible ads", an ad block that will expend larger then it's size when a visitor clicks to expend it, by the way you wont get credits until they actually click again to visit the advertiser landing page, it could be a video ad, a flash clip or an interactive widget.
More juice for us and more attention to advertisers, thank you Google.
No action recuired on your side to show these ads, if your ad unit is "Image" or "Image/Text" then you will see them soon, text only ads wont display them.

Follow the link to learn more.