Arielle Garcia’s Post

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Director of Intelligence @ Check My Ads - The Digital Advertising Watchdog | Privacy | Data Ethics | Responsible Media & Tech

Thanks to Paul McIntyre/Mi3Australia for passing along my question about x-goog-visitor-id, and publishing the response. (link: https://lnkd.in/eduw6NDn). Google has had nearly a year to "dig deeper" into this question, and the best they can do is repeat last year's unpersuasive talk track, promote Pmax, and hope we'll forget? Nobody asked for a response to my opinion. We asked about what a specific, seemingly undisclosed user identifier is, and what it is used for. We need to keep asking the question. #adtech #bigtech #privacy #transparency

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James Rosewell

Co-Founder @ Movement for an Open Web (MOW) & 51Degrees

1mo

Arielle Garcia have you done any analysis of Google's X-Client-Data? This was part of 51Degrees - Fast & Accurate Device Detection - original February 2020 submission to the Competition and Markets Authority that lead to the foundation of Movement for an Open Web. ⬇ https://assets.publishing.service.gov.uk/media/5e8c595c86650c18c966660e/200212_51Degrees_Response_to_Interim_Report-.pdf In summary it's a large integer, that could be used to provide a unique identifier or as part of generating a probabilistic identifier, that is sent to a hard coded list of Google domains in Chromium where users and web sites operators have no control over it's presence or value. For example; using gstatic to obtain a font library will result in the key/value pair being sent in the request header. This can be observed in Chrome developer tools. A company that has received some of the largest fines by regulators is restricting lower risk data for others whilst retaining higher risk data features exclusively for themselves.

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Nick Manning

Media Agency co-founder, ex-agency CEO, Founder at Encyclomedia International, Non-Exec Chairman, Media Marketing Compliance, Adtech advisor, commentator, investor, writer

1mo

Could the statement from Google be any more bland and meaningless?

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