Google announced that they are rolling out the AdWords Campaign Experiments (ACE) tool to all U.S. advertisers. ACE was in beta about two months ago and enables advertisers to perform faster, more accurate tests by executing your experimental campaign alongside your original campaign.
Google said ACE helps advertisers by making it :
it easier to test and precisely measure the impact of changes to your keywords, bids, ad groups and placements. Over the last two months, advertisers in our beta have reported that ACE has helped them feel more confident in the impact of their campaign changes, making it easier and less risky to try different strategies and optimize more frequently.
Google said over the “next few weeks”, most U.S. advertisers will automatically see ACE under Campaign Settings when they sign in to AdWords.