How to implement Cookie Re-Store on domain B?

Google Tag Manager Server Container
1

In the Blog I do not understand how to set this up on domain B (stape.dev)
This is point 4 in the blog article.

My questions are:

  • what do you mean by “In the sGTM container of the destination site”? That makes no sense as sGTM is a server

  • in this screenshot, for domain B (stape.dev), what kind of trigger do I need so cookies get restored on domain B?

  • on domain B in web GTM, do I need any specific Tag or script to make the restoring happening?

  • Extra question: Do I need web GTM on domain B or can I achieve this with a Google Tag / GA4 tag only (with server_container_url)

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Would be amazing to have a video for that :slight_smile:

2

@Alex could you help me out here?
The blog article seems not to describe how the re storing works.

3

what do you mean by “In the sGTM container of the destination site”? That makes no sense as sGTM is a server

The example in the article uses two different sGTMs. However, this does not significantly affect the configuration.

in this screenshot, for domain B (stape.dev), what kind of trigger do I need so cookies get restored on domain B?

You can use a trigger based on whether page_location contains the _gl parameter. It is used when navigating between cross-domains if this is configured in GA4.

on domain B in web GTM, do I need any specific Tag or script to make the restoring happening?

you need to fire Cookie Restore tag

Extra question: Do I need web GTM on domain B or can I achieve this with a Google Tag / GA4 tag only (with server_container_url)

You need GTM-sGTM as cookies will be restored based on request that sends to sGTM and on that request ReStore tag should grab cookies based on user id (_ga cookie in example) and send it on response header of init request

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