The report is available only in CNStats PRO.
The report displays the list of formats of advertisements, through which visitors jumped to your site.
Clicking on "" icon displays the list of the advertiser's site pages, from which visitors jumped to your site (referrers).
(*) Unfortunately, while jumping via certain Google AdWords advertisements all the jump information is lost, therefore none of "Google AdWords" reports can provide complete statistics. These reports may be used only for generalized conception.