Rich Media average display time
The average amount of time, in seconds, that rich media creatives were displayed to users during the specified date range. For creatives that include both a banner element and an external element (i.e. banner with floating), only the display time for the external element is included. For expanding creatives, display time is counted even when the creative is not expanded. For interstitial with reminder creatives, the display time for the floating element is counted.