Whether you rely on 1st or 3rd party data, browsers’ tracking restriction will impact us all equally

Mathieu Roche

Mathieu Roche

On Sep 19, 2019 / by Mathieu Roche - ID5 / -- Recent announcements about Safari and Firefox’ restrictions to read and write third party cookies have sparked many press articles explaining that this would signal the end of third party data and that first-party data would rule the world. Just because “data” and “cookies” can both be “First Party” or “Third Party” doesn’t mean these notions have anything to do with each other. The fact that a piece of information comes from a first or third party source is totally irrelevant to the discussion about browser tracking policies…in either case, you will be impacted by their decisions.

Let’s try to clarify this common confusion: 

  • For data, first or third-party relates to who the data is collected and used by first-party data is collected by the party that uses it, while third party data is collected by one or more providers that are different from the party that uses it. E.g.:

    • Browsing behaviour collected on Website A and used by Website A = first-party data

    • Demographic details collected by Provider 1 and used by Brand 2 = third party data

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