We noticed that the ID's created by the Google cookie matching service tag are device ID's. So one user can have multiple ID's, instead of one. Because of that, we can't use these ID's for cross-device stitching and cross-device retargeting for our Google ads.
To tackle this issue we would like to be able to send multiple Google ID's to Google via Audience Stream. In Audience Stream we're able to capture all known Google ID's and create an array of these ID's. If we could send this array to Google our problem would be solved, and we could create cross-device audiences.
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