DoubleClick Search overview
Floodlight is a system DoubleClick Search (DS) and DoubleClick Campaign Manager (DCM) use to track and report conversions.
A Floodlight tag is an HTML tag that you place on an advertiser's site. When a customer clicks an ad and lands on a page with a Floodlight tag, the tag sends data about the conversion to DS and DCM. The conversion data is stored 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.