run of site (ROS)

Run of Site (ROS) is a term from online advertising. When booking the banner format, the Run of Site specification determines that the booked number of ad impressions can be switched freely from specifications.

With this type of booking, the website provider is not given a frequency cap or other time-related insertion frequencies for the insertion of the web advertising, nor any topic- or product-specific placement regulations. In the case of Run of Site, the banner to be placed does not have a fixed position on the website and can be distributed across the website.

The booking quota for an ROS campaign can be distributed as desired over the booked period. Run of Site ads are less expensive than other banners and have a lower success rate.