Google is not shy when it comes to testing new ad formats for Google Adsense.
Most recently they have stepped up their expandable ads, added the scrollable ad arrows back to some ads and tested animated AdSense units.
The one thing advertisers really really want are responsive ad units.
That being said, Google is asking for feedback from publishers on which new ad formats and settings they would like to see Google try next.
In a Google+ thread, Google asked:
If you have any feedback, join the Google+ thread.
Forum discussion at Google+.
