The wrapper interaction with a CMP is very similar to the interaction GAM has with a CMP. Before each auction initiates (not when the wrapper is loaded or at different points), the wrapper will look for the CMP (both TCF 2.0 and US Privacy). If one or both are detected, it will enable the prebid consent module, which means it will wait for the CMP to retrieve consent before proceeding with the auction.
As a side note: If you run a CMP on countries/regions that do not require a CMP, the wrapper will still wait for the CMP to instruct it that it doesn’t require any consent.
If there is no CMP detected, the auction will run normally.
To enable the console, put this at the end of the URL: ?magma=true, and the console will pop up in the top-left corner.
There are 2 modalities for consent frameworks:
The console will run two types of checks: first it detects if the above CMPs exist, then it checks if the CMPs work correctly.
If this CMP exists on site, we see this message: “Prebid detected an IAB US Privacy CMP”.
If it is not implemented, we see: “Prebid DID NOT detect an IAB US Privacy CMP”. We can also see this message when the CMP is implemented, but it is slow and has not yet loaded at the time of the check. This is not optimal, we should make the CMP load before the wrapper if you always want to be compliant.
If it has consent, we see this message: “Interaction with IAB US Privacy CMP successful”. There might be an additional information such as: “IAB US Privacy CMP does not apply for this region”.
If it doesn’t have consent, it means that it either doesn’t have it yet (e.g. the privacy pop up is still open), or the user is not from California (according to the CMP provider). The message is “interaction with IAB US Privacy CMP failed”. To test this we need to use a California VPN (incognito).
If this CMP exists on site, we see this message: “Prebid detected an IAB TCF 2.0 CMP”.
If it is not implemented, we see: “Prebid DID NOT detect an IAB TCF 2.0 CMP”. We can also see this message when the CMP is implemented, but it is slow and has not yet loaded at the time of the check. Another case is when a site uses TCF 1.0 version, which is not supported anymore.
If it has consent, we see this message: “Interaction with IAB TCF 2.0 CMP successful”. There might be an additional information such as: “CPM API Response: GDPR Applied: true Status: cmpusshown” and “Status: useractioncomplete”.
On all examples the ad refreshes every 30s.
In the 3rd example you can see that the first time the CMP is not detected (since the CMP is loaded after 3 seconds), so the auction goes normally. The second auction the CMP was loaded and the wrapper detects it:
We have set some key values for reporting. If you wish to dig deeper, please request a CMP report from your account manager.
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