I also have this happening a little bit as well, I'm thinking it could be that some users have disabled personalized ads in their Google Account. For example if you go to
https://myaccount.google.com/data-and-privacy and disable personalized ads, it says that your ads won’t be personalized on Google sites and apps, nor on sites and apps that partner with Google.
I think people might be disabling personalized ads when they first setup their google account on their phone.
On Saturday, June 10, 2023 at 1:11:25 AM UTC+7 Ronald Dwk wrote:
Admob dashboard-->Reports-->Admob Network-->under "Dimensions" I selected "Server restriction" under most of my apps it reads "Personalization disabled" why is that? under countries, 90% are United States, Show rate is mostly 0.00%, Est. earnings 0.00.
Personalized ads-Yes
GDPR-Yes, Consent rate is 90% ( I also have a post on it)
CPRA-Don't restrict data processing
Ad content rating-MA
Countries-All around the world, mostly USA not just EEA and the UK
Any other changes-No, all my settings are Admob defaults