Google announced that a new type of rich media advertisement is available for Adsense publishers.
Expandable ads expand beyond the original size of the ad unit, following a user-initiated action. (If it sounds like an disruptive experience it's certainly being perceived that way by some.)
Expandable ads will be served as third-party ads and will be created by Google-certified rich media vendors for display advertisers in the network. If you're an advertiser, this presents an excellent branding opportunity.
Publishers generate earnings from a CPC-priced expandable ad when a user visits the advertiser’s landing page, rather than when a user clicks to expand the ad. I for one can not believe that publishers will be excited about the possibility of not knowing what payout they will receive on these type of ads.
Adsense publishers are eligible to receive expandable ads if the Adsense code has been added directly to the source code and image ads have been enabled. It's important to note here that these new ads are only being tested by a handful of U.S. advertisers - those that bid on sites where they want their ads to appear.
Should one of the expandable ads be way too annoying for your users, publishers can use the competitive ad filter to block the ads.
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