Google Analytics collects the information it normally does, as well as the DoubleClick cookie when that cookie is present in relation to display advertising tracking.
https://support.google.com/analytics/answer/2444872
Analytics and Tracking · Advertiser Tracking
Get access to data on 1,176,957 websites that are Google Analytics with Ad Tracking Customers. We know of 103,180 live websites using Google Analytics with Ad Tracking and an additional 1,073,777 sites that used Google Analytics with Ad Tracking historically and 53,433 websites in the United States.
Google Analytics with Ad Tracking websites that are also using other technologies.
Get a list of 1,176,957 websites using Google Analytics with Ad Tracking which includes location information, hosting data, contact details, 103,180 currently live websites and an additional 182,335 domains that redirect to sites in this list. 1,073,777 sites that used this technology previously and 53,433 websites in the United States currently using Google Analytics with Ad Tracking.
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