Ep 6: The Prebid Universal Creative

Your Prebid bid won. So where does the ad come from…

The Prebid Universal Creative is a small script that fetches and shows the winning ad.

Your Prebid line item doesn’t hold an ad. It holds this script. When the line item wins, the script reads one key-value, HB ad ID, the winning bid’s ID, say seven F three. It asks Prebid.js, on your page, for ad seven F three. If the slot sits in a SafeFrame, a protective iframe, it asks by passing a message across the frame. Prebid hands it over, and it renders. Since Prebid ten point eleven, two more keys tell the script which version and format to load. In apps, it reads the ad from Prebid Cache instead.

Today, open one Prebid creative in Ad Manager and check it loads the universal creative.

Next, managed wrapper versus self-hosted Prebid.