Optimize for conversions

The term "optimize for conversions" describes the situation when the ads expected to provide more conversions are delivered more often into the ad auction than other ads in the ad group. This option optimizes for conversions, so it takes both clickthrough rate (CTR) and conversion rate into consideration. If there isn't enough conversion data to determine which ad will provide the most conversions, ads will rotate using "Optimize for clicks" data. Although this option may result in your ad group receiving fewer clicks than the previous option, it will likely receive more conversions, which can result in an improved return on investment (ROI).