- Impression is considered a viewable impression when it has appeared within a user’s browser and had the opportunity to be seen.
- The Interactive Advertising Bureau (IAB) defines a viewable impression as an ad that meets the following criteria:
- For ads, 50% of the ad’s pixels are visible in the browser window for a continuous 1 second.
- For larger ads (those greater than 242,000 pixels), 30% of the ad’s pixels are visible in the browser window.
- For in-stream video ads, 50% of the ad’s pixels must be visible in the browser window for a continuous 2 seconds.
What is a viewable impression & viewability? Print
Created by: jasper yap
Modified on: Wed, 8 Apr, 2020 at 11:10 AM
Did you find it helpful?Send feedback
Sorry we couldn't be helpful. Help us improve this article with your feedback.