Google AdWords announced that Conversion Optimizer is now available to more ad campaigns. Any ad campaign which had at least 15 conversions in the last 30 days is eligible to use Conversion Optimizer. You can track these conversions either through AdWords Conversion Tracking or as linked Google Analytics goals.
One of recent Google analysis revealed that campaigns which adopted Conversion Optimizer gained a 21% increase in conversion as well as decreased their CPA by 14%.
To know more about Conversion Optimizer, please visit the AdWords Conversion Optimizer page.