Google tests new things all the time. They have to in order to figure out the best way to deliver ads to visitors as well as the best way to get those visitors to engage in those ads so advertisers keep paying Google for the chance to be there.
Oftentimes these tests are minor and can go relatively unnoticed but this latest effort is pretty interesting and quite differnt, at least from my perspective.
Google is testing whether prospects will ask for more information via their Gmail account which is already filled in for the email address to be used for the offer. Similar tests have been running around building newsletter lists but this move to offers marks a different approach. Here is what it looks like