How does Strossle measure impressions?

Joakim Updated by Joakim

We adhere to the MRC viewable impression measurement guidelines and only count impressions when:

  • More than or equal to 50% of the pixels in the recommendation were on an in-focus browser tab on the viewable space of the browser page
  • The time the pixel requirement is met was greater than or equal to one continuous second, post recommendation render.


Improved viewable impression tracking was made available on the 9th of June, 2021, for v2 widgets. This change greatly improved the precision of our reporting:

  • Number of reported impressions decreases
  • CTR on ad-, article- and widget impressions increased
  • CPM rates increased

Legacy widgets (v1)

For those legacy widgets (v1) still in use, we count an impression as soon as a recommendation (article or ad) is in-view on the users device, without any time or pixel restraints.

How did we do?

How do I prevent Widgets from displaying the same recommendations?