Report on performance

Active View reporting

Active View  tracks the viewability of ads served. 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.


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 for a meaningful length of time.

Learn more about Viewability and Active View.
Learn about Viewability with Google.

View related Skillshop training course

Active View metrics

To report on Active View metrics, select them from their respective report metric families (for example, Total, Ad server, Ad Exchange). 

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) the impression is counted with a downloaded pingback.

Active View measurable impressions
Impressions that were measurable by Active View out of the total number of eligible impressions. This value should generally be close to 100%; however, 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. A display 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 measurement standards). For in-stream video ads, 50% of its area must be displayed for at least two seconds.

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.

Ad Manager's measurability metric focuses on actual measurement gaps, which you can resolve by removing iframes (learn more about troubleshooting viewability). 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

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 (seconds)
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. 

Active View non-viewable impressions
Total number of impressions that were measured, but deemed not viewable.

Active View non-measurable impressions
Total number of impressions that were not measured (e.g., impressions where measurement was attempted and failed).

Active View viewable impression distribution
Percent of impressions where measurement was attempted, succeeded, and deemed viewable.

Active View Viewable impression distribution  is calculated as: (# Viewable impressions) / (# Active View Eligible Impressions)

Active View non-viewable impression distribution
Percent of impressions where measurement was attempted, succeeded and deemed non-viewable.

Active View Non-Viewable impression distribution is calculated as: (# Not viewable Impressions) / (# Active View Eligible Impressions)

Active View undetermined impression distribution
Percent of impressions where measurement was attempted, but measurement did not succeed.

Active View Undetermined impression distribution is calculated as: (# Not measurable impressions) / (# Eligible impressions)

Some inventory may not be eligible or measurable

There are instances where Active View eligible or measurable 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 about GPT request modes and asynchronous rendering.
  • Serving an eligible tag within a cross-domain iframe affects our ability to capture viewability data. These impressions may not be measurable.
  • 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 Google Ad Manager servers. For example, a user might close the browser too soon for the tag to finish establishing communication.
  • We don't measure viewability for out-of-page creatives.

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

Learn more about Ad Exchange reporting:
Was this helpful?
How can we improve it?

Need more help?

Sign in for additional support options to quickly solve your issue

Clear search
Close search
Google apps
Main menu
Search Help Center