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Active View metrics

Active View tracks the viewability of ads served via Google Publisher Tags (GPT). Active View is already enabled on these tags, so no additional work is needed.

Viewability helps determine how likely it is that an ad was actually seen by a user. Two important factors are (a) what percentage of an ad appears in a viewable space on screen and (b) how long that portion of the ad remains visible. Measuring viewability helps publishers and advertisers assess the value of an impression.

For example, consider a placement at the bottom of a webpage. If a user needs to scroll down to see the bottom of the page, the user might not see the ad before navigating away. Yet for a user with a larger screen, the entire page might appear in a viewable space—which means the ad is visible, too. Both scenarios count as impressions, but only viewability tracks whether the ad actually became visible to the user.

Learn more about Viewability and Active View.

Active View metrics

To report on Active View metrics via the Query Tool, select them from the respective report metrics group (e.g., Total, Ad server, Ad Exchange). 

These definitions apply to Ad Exchange Active View, AdSense Active View, Standard Query Tool metrics, and Ad serving metrics.

If your ads are being served by a third-party and you want Active View metrics broken down by vendor, include the "Third-party vendor" attribute from the "Creative" dimension. Learn more about dimension attributes.

Active View eligible impressions
Total number of impressions that were eligible to measure viewability. An impression is eligible if (a) the ad's creative has an Active View enabled tag, and (b) at the time the impression is counted.

An out-of-page ad request may be counted as an Active View eligible impression even if the ad server impression isn’t counted (e.g., the creative doesn’t contain a viewed impression macro).


Active View measurable impressions
Out of the total number of impressions that were eligible, those that were measurable by Active View. Even when an ad tag has Active View enabled, some factors may prevent the tag from capturing data. For example, an impression that is rendering in a cross-domain iframe may not be measurable.


Active View viewable impressions
Number of impressions on the site that were viewable out of all measurable impressions. An ad is counted as viewable if at least 50% of its area was displayed on screen for at least one second (the minimum criteria according to IAB standards).

For in-stream video ads, 50% of its area must be displayed for at least two seconds. Not all measurable ads are viewable, because you can't confirm that an ad has met the criteria for viewability unless it can be measured.


Active View % measurable impressions
Percentage of impressions that were measurable with Active View, out of the total number of Active View eligible impressions, calculated as: (measurable impressions ÷ eligible impressions) × 100

An ad is measurable when the Active View enabled tag successfully captured viewability information about the impression. Viewable impression measurement tools experience a small amount of data loss in addition to measurement gaps from some cross-domain iframe scenarios.

DFP's measurability metric focuses on actual measurement gaps, which you can resolve by removing iframes. The data loss is randomly distributed across viewable and measurable impressions, and therefore % Measurable is a reliable indicator of measurability for the publisher's inventory.


Active View % viewable impressions
Percentage of viewable impressions out of all measurable impressions, calculated as: (viewable impressions ÷ measurable impressions) × 100

For example, say the ads on your site had 100 measurable impressions. That means there were 100 impressions where Active View enabled tags were able to measure viewability. If only 10 of those 100 impressions were measured as viewable, then the site would have 10% viewable impressions.

Active View Average viewable time
The average time (in seconds) that an individual ad impression was deemed viewable, calculated as: (average viewable time ÷ 60). For example, if the value was 136.8, it would be equivalent to "average viewable time ÷ 60 = 2.28 minutes."

This metric works across display, mobile web, and video inventory. 

Learn about why some inventory may not be eligible or measurable

There are instances where Active View eligible or measureable impressions are less than served impressions:

  • An ad request URL exceeding a character limit is truncated. These impressions are not eligible. You can detect a truncated ad request URL if the parameter trunc=1 has been appended. Learn more
  • Serving an eligible tag within a cross-domain iframe affects our ability to capture viewability data. These impressions may not be measureable.
  • Communication issues may arise due to a problem with the browser or internet connection that occurs before the tag can finish sending data to the DoubleClick servers. For example, a user might close the browser too soon for the tag to finish establishing communication.

Learn more about Using the Publisher Console to troubleshoot delivery problems.

Ad Exchange sellers can view more information about Active View in the Ad Exchange help center. You must have an active Ad Exchange seller account to access the online help.
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