Google Adwords Campaign Experiments (ACE) have now been opened up to all U.S. advertisers. This is a free tool that allows you to more easily test the impact of your ad changes.
Now, instead of simply tweaking ad copy, bids or placements, and crossing your fingers for better results, you can instantly create a revised test ad that runs alongside your original. So now, you’re really able to compare your results apples-to-apples. Test both ads. See which offers the best ROI. And lose the loser.
Many Adwords professionals were already doing this manually. But Google Adwords Campaign Experiments now makes it easier.