Google Expandable AdSense ads introduces

Google today announce the new Expandable Adsense Ads, a new type of ad that can appear on your pages. Expandable ads are rich media ads that can expand beyond the original size of the ad unit, following a user-initiated action. This creates more real estate for the ad, allowing for more interaction from interested users.

Many users may find expandable ads annoying, but as Google points out, the format could be valuable to both advertisers and customers when used to show movie trailers, video game clips, or other images that require greater emphasis on detail.

And like other Google ads, you’ll earn based on whether the expandable ads on your site are priced on a cost-per-click (CPC) or cost-per-impression (CPM) basis. Keep in mind that you’ll generate earnings from CPC expandable ads when a user visits the advertiser’s landing page, and not when a user simply clicks to expand the ad.

Google says that AdSense content network publishers who have enabled image ads and have AdSense code on their websites are automatically eligible to show expandable ads with no additional action required. Source