GoogleAnalytics -> Ad ID?

Hi there,

I just now submitted a new version of my app to the appstore for review. New feature is the Cordova Google analytics plugin.
Nothing else changed, but Apple warned me that I was now using the Ad ID and asked what kind of advertisement I was using it with. Not sure where it could have come from otherwise?

Is google analytics and the Ad ID related in some way?

Thanks,
EL