If you don't use AdMob Mediation, then you don't need to add other SKAdNetworkIdentifiers. You just need to add the value for Google (cstr6suwn9.skadnetwork). If you were using AdMob Mediation, then you would need to add the values for the Mediation networks that you were using. At least that is what I understand based on:
REASON 1
This was also asked and answered in the Google Mobile Ads SDK Developers forum.
The question is:
hi,
We have the app with google mobile ads SDK and didn't see any third
buyer for this So we are confused that from the link:
https://developers.google.com/admob/ios/ios14#skadnetwork it's said
"includes SKAdNetworkIdentifier values for Google
(cstr6suwn9.skadnetwork) and select additional buyers who have
provided these values to Google"
So in this case, If our app doesn't have additional buyer, what we
should do? For SKAdNetworkIdentifier, Could we just the google value
(cstr6suwn9.skadnetwork) here?
The answer was:
Hi there,
Thank you for reaching out to us.
With regard to your question, you can use (cstr6suwn9.skadnetwork)
since your're only using Google product. For your question regarding
if your app doesn't have additional buyer, as you are only using
Google product, there's no other steps you need to do other than
including in SKAdNetworkIdentifier values the Google
(cstr6suwn9.skadnetwork).
Regards, Google Logo Princess Pamela Pineda Mobile Ads SDK Team
The other answer was:
Hi there,
I work with Pamela and will assist you. Mediation Partners have their
own SKAdNetwork codes. The recommendation is to include all codes that
may be used by an ad, meaning all sources for your ads should have
their own code placed in your plist.
Regards,
Google Logo Aryeh Baker Mobile Ads SDK Team
REASON 2
By looking at the AdMob Mediation documentation. For example, for Facebook it says:
Facebook asks that you add the following SKAdNetwork identifiers to
your project's Info.plist file:
<array>
<dict>
<key>SKAdNetworkIdentifier</key>
<string>v9wttpbfk9.skadnetwork</string>
</dict>
<dict>
<key>SKAdNetworkIdentifier</key>
<string>n38lu8286q.skadnetwork</string>
</dict>
</array>
I had the same question :)