Google has made a change to its AdWords reporting tools, which now provide more detail on where ads in the system have been run, reports ClickZ.

Google has begun offering customized reports to advertisers that include the URLs of sites upon which given ads have been run, as well as metrics on those sites.

The new report is called Placement Performance. It fills a long-endured gap in the AdWords reporting functionality. With the ability to track conversions on particular sites, advertisers can also use an "exclusion" tool to disable unsavory sites from running their ads.

The move is designed to improve ad placement and performance by adding an element of human interaction to the algorithm. All advertisers, except for those in South Korea, will have access to the Placement Performance report within the next two weeks.