Unexpected non_personalized_ads in user snapshot stream - Firebase Analytics

Question

I have an app developed in Flutter with Firebase Analytics configured. I was looking at Stream View inside Firebase Analytics and I noticed this in one of the users stream

The case is that I don't have any ads inside my app. Should I be worried (eg. that some package I use is doing it) or is there some explanation why non_personalized_ads tag appeared in the stream?

Solution

From analytics docs:

https://firebase.google.com/docs/analytics/configure-data-collection?platform=android#re-enable_peronalized_advertising_features

When ad personalization signals have been disabled for a user via one of the mechanisms defined above, subsequent event bundles logged from that user's device will contain a user property named "non_personalized_ads" with a value of 1 to indicate that events in that bundle are not available for personalized advertising.

and

Note: Google may in certain circumstances disable personalized advertising for analytics data collected from an end user, even when you have not done so, where Google has information that the respective end user is not eligible for personalized advertising (for example, the end user on an Android device is under the applicable age per our advertising policies).