In shortThis tutorial adds values you've stored in cookies or Local Storage (click IDs, attribution data) to outbound links using a Custom HTML tag in Google Tag Manager. Use it for cross-domain tracking of click IDs, attribution and data enrichment.
Chapters
What you need before you start
- Publisher access in Google Tag Manager
- The cookie or Local Storage values you want to pass
Steps covered in the video
- Copy the template script from GitHub.
- Paste it in a GTM Custom HTML tag.
- Edit it to target your cookies, Local Storage items and destination domains.
- Fire it on DOM Ready, on all pages or only key pages.
- Test the links.
Resources
Recorded in October 2025. Some screens may look different today.
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