Ginny Marvin, now of Google, said on Twitter that Google considers subdomains, country TLDs and vanity URLs owned by the same company would be considered a first party context. One caveat is that Google has a 5 domain limit per first-party set for vanity URLs.
Navah Hopkins asked the question on Twitter:
Hi Navah, I just want to make sure I understand first. Do you mean can data collected from sub domains (lead gen forms etc) be used by the brand/company in first party context for advertising later?
— Ginny Marvin (@GinnyMarvin) March 18, 2021
Also curious if this applies to different country domains:https://t.co/XpfUGSeWtqhttps://t.co/xXGFRMRjLkhttps://t.co/eJcuJEaHYm
Would they be able to share audiences across properties or would they need to generate their own audiences?
— Navah Hopkins (@navahf) March 18, 2021
Ginny came back and explained that Google considers subdomains, country TLDs and vanity URLs owned by the same company would be considered a first party context. With that caveat that Google has a 5 domain limit per first-party set for vanity URLs.
Hi Navah, Thx for your patience. Subdomains, country TLDs and vanity URLs owned by the same company would be considered a first party context. (I believe for vanity URLs there’s a 5 domain limit per first-party set.)
— Ginny Marvin (@GinnyMarvin) March 19, 2021
Forum discussion at Twitter.