DoubleClick Search overview
An iframe tag that you place on an advertiser's site to record conversions and report them to DoubleClick Search (DS) and DoubleClick Campaign Manager (DCM). DS and DCM store the conversion data in a Floodlight activity, which you can include in reports.
DS and DCM automatically create a Floodlight tag when you create a Floodlight activity. Then you place the Floodlight tag on a confirmation page or other page where you want to track conversions. Learn more.