What is Viewability And How to Use This Metric For Effective Ads Placement

The fact that an advertisement was shown does not mean that it was seen. The conditional 20 million coverage is great, but you need to check which of them actually saw the ad. And here helps the visibility of advertising, viewability.

The fact that an advertisement was shown does not mean that it was seen. The conditional 20 million coverage is great, but you need to check which of them actually saw the ad. And here helps the visibility of advertising, viewability. Intuitively, high visibility is good, but newage. has measured the real relationship between visibility and ad performance with new tools from Google. In this article, Senior Traffic Manager Lyudmila Bilyavska will talk about the progress and results of an experiment with a client campaign.

ad viewability example
What is viewability

Viewability is a relative digital ad metric that shows, how many times users have seen an ad out of a total number of impressions. It is expressed as a percentage and is calculated as the ratio of viewable impressions to their total number.

According to the standards of IAB Europe and Ukraine, the following shows are considered “viewable”:

  • for banner ads — 50% of the banner was in the visible area of the screen for 1 second;
  • for video — 50% of the player was in the visible area of the screen for 2 seconds.

You don’t have to calculate viewability manually — the metric is available in reports from Google Ads, Display & Video 360, Google Campaign Manager, and some other advertising accounts. 

The Role of Viewability in Display Advertising

Visibility is important for evaluating ad placements to help you select sites that actually show your ad to readers. Moreover, problems are evidenced not only by low indicators, but also by coefficients close to 100%. The screenshot below shows an example of a viewability hack: a small autoplay screen. The user will not notice it at all, but the advertiser will consider the impression, moreover, visual, high-quality.

video viewability scam to avoid
Video Viewability: Such placements are called content rolls; we discourage clients from running ads in them

Also, viewability should be taken into account when developing creatives—do not expect the user to look at ads for a long time. From each slide of the banner and from the first seconds of the video, it should be clear which brand and product is being advertised. If the user does not see the brand and does not remember it, then, accordingly, the media effect will be lost.

Case Experiment: How Viewability Affects Delayed Conversions

We consider viewability at the stage of quality control of advertising placement because we need to make sure that campaigns are effective and users see ads. But until a certain period, we did not analyze how visibility affects the reaction to advertising.

Let’s imagine a hypothetical campaign with 20 million impressions and 5 million reach. Of those 5 million, we have 2,500 clicks, 7,500 post-view conversions, and another 15,000 cross-device clicks.

Viewability helps you calculate real reach and impressions. Then the question arises — how to distinguish visual impressions among delayed conversions?

why is viewability important
Viewability importance in digital advertising

And for several years we lived in the paradigm that in terms of Viewability, we have data for these indicators, but in terms of conversions, we don’t and cannot have it.

Here it is worth clarifying that newage. is a Google Marketing Platform Partner agency and our CEO is a Certified Platform Trainer. At one of the seminars, where trainers spoke about new products, and we found the solution — an attribution model for viewable impressions. We decided to immediately test the model on client projects.

How to Run a Viewable Impression Attribution Campaign 

The attribution model for viewable impressions is a live tool that can be used in Display & Video 360 and Campaign Manager. In Campaign Manager 360 this will only work if we use it as an ad server. And to launch in DV360, go to the partner settings, select the Floodlight Group in the resources, then select “Attribution Models” and here “Last Interaction — Viewable Only”.

viewability dv360
How to set up a viewable impression attribution campaign in Display and Video 360

By adding this setting, you will be able to highlight conversion data only for viewable impressions from all the information.

We wanted to compare whether viewability on impressions and reach correlates with viewability on conversions, including delayed, post-view. Therefore, we set up such a model for the client. Next, let’s take a look at real campaign data from one of our clients, who, for obvious reasons, will remain anonymous.

Experiment and results

viewability data
An example, how to calculate the viewability rate

The screenshot above shows the results of the client’s campaign. Campaigns are sorted by overall viewability, and then in the columns, we compare post-click and post-view conversions by the standard attribution model and by Viewable Only. As you can see, the lower the viewability of the campaign, the more the data on attribution models diverges.

For example, in the “Banner_Custom affinity” campaign (second from the bottom), 87 people came to the advertiser’s website by click and 240 by post-view. Let’s compare this with attribution based on viewable impressions. We had 240 post-view conversions, although in fact, those people who actually saw the banner made only 45 conversions. And out of 327 conversions of those who actually saw the banner, only 129.

This confirms the basic hypothesis that when we have viewability below 30%, the standard model conversion rate in post-view and cross-device is useless.

Further data, respectively, deviations: according to post-view, there are 81% fewer real actions for those people who actually saw the ad. With low viewability, there are much fewer conversions.

Potential and Further Steps

  1. Since we started doing all this only a month ago, I would like to explore it again and on more data, including video.
  2. Basic data on viewability should be used to analyze the performance of sites/targeting and take into account performance only for viewable conversions.
  3. Obviously, the viewability of a YouTube video will be around 90% or higher. But, if we are launching on direct platforms, it would be interesting to show the client the results of the promotion in real terms, in numbers, taking into account whether the user could see the ad at all.
  4. It is also useful to analyze attribution by viewable impressions at different frequencies. Such an analysis will require more data, so it is still in the plans.


Viewability proves whether ads work or not. Extremely low or unreasonably high viewability may be a reason to reconsider the campaign settings and the order of its placement.

Viewability needs to be tracked to better analyze post-click, post-view, and cross-device conversions. In general, you should switch to viewable reach and viewable conversions in order to optimize your ads more effectively.

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