Google announced quietly on Google+ that they have an opt in beta where AdWords advertisers can create draft campaigns and set them to run, with part of your campaign budgets, to test to see how well those drafts do in the real world.

Google calls this “Campaign drafts and experiments.” Campaign drafts and experiments is a beta feature that lets you quickly test changes to your AdWords campaigns, measure results, and apply those changes to help you meet your business goals, Google said. Here is the example Google has given:

To request into this beta, fill out this form.

Forum discussion at Google+.