Tracking an ad’s performance just became easier with the new Sites Report available in the new AdSense interface.
Manually created URLs won’t be necessary anymore to track your ads. Instead, a detailed report will show your ad’s effectiveness under the Performance Reports tab.
Performance data is tracked for content, mobile content, feeds and domain data. Another feature available is the multi-dimension reporting, which analyzes your site’s performance by topics such as ad type, targeting type and platform.
Data from dates prior to the release of the Sites Report will not be available. Visit AdSense Help for more information.