A: SAS is IAB certified and uses a combination of methods for accurate detection:
Geometric: The platform measures the coordinates of the ad unit on the page in reference to the browser frame. If the coordinates are outside the browser frame, the ad is not viewable.
Browser Optimization: The platform monitors internal browser settings to detect when an ad is being rendered. If the browser does not render the ad, the ad is not viewable.
Publisher File: One thing that prevents an impression from being recordable is the publisher's use of blind iFrames. If publishers have received rich media certification, they will have the SAS addineye file on their domain, which allows us to "see through" blind iFrames. Note that this solution is not applicable for programmatic buy and ad networks.
For more information, see Viewability
A: There are several factors that impact whether the platform can record viewability data.
The platform uses proprietary methods to help increase these metrics, so for cases in which the STR or recordable rate is very low, the publisher should consider implementing SafeFrames or contacting the SAS Certification team to help alleviate this problem.
Other reasons might include:
very old browsers
browsers that do not support the technology of the ad (such as Flash ads to mobile devices or HTML5 ads to legacy mobile phones)
A: See Supported Ad Formats by Product.
A: Yes, this is available through the Viewability reports in the Analytics Reporting. From the Verification Dashboard, you can only see viewability metrics at the site or domain level.
A: The IAB defines an ad as viewable if at least 50% of the ad was in view for at least one second. However, some agencies and advertisers - for their own reporting and media planning purposes - might want to change the thresholds for what counts as "viewable." For example, an agency might want 100% of the ad to be in view for at least three seconds. In the platform, the default IAB thresholds can be changed on both the advertiser and agency levels.
A: In one study, when comparing performance for ads that had above 70% viewability across all measured impressions versus ads with less than 70% viewability across all measured impressions, these metrics were most affected: