If you are you using URL channels to track the performance of specific domains and subdomains where you're showing ads -- do you know this information will be tracked automatically in the new AdSense interface, within the sites report.
"The sites report tracks performance data for your content, mobile content, feeds and domains data. You'll also be able to use the multi-dimension reporting feature to analyze your site's performance by ad type, targeting type, platform, and more. Please note that your sites report will only contain historical data beginning in late June 2011. In addition, there're a few limitations to this report for publishers with an extensive number of domains," informs Guillaume Ryder - AdSense Engineering.
"With the new sites report, you'll no longer need to manually create a new URL channel to track each new domain or subdomain where you've placed your ads. This will help ensure that you've more detailed data about your ad performance from the get-go, without any additional effort required on your part," Ryder explained.
Also, "instead of creating URL channels, you can start using more of the 200 channels available in your account to create custom channels. These allow you to track and group your ad units on an even more granular level," added Ryder. (And don't forget to turn those custom channels into ad placements, so advertisers can find and target them!)
To get started with the new sites report, sign in to the new AdSense interface and navigate to the Performance reports tab. Choose Sites in the left navigation.
More information is available in Help Center.
[source: Inside AdSense]