12 Cutover
Flip browser traffic from the legacy GTM tagging path to the new first-party tagging endpoint and confirm the live system is serving events correctly.
Note: This step content was written for the original dual-run architecture and is being updated for the current setup workflow. The guide overview reflects the current approach.
This step is being finalized. Content is accurate but will be updated and expanded before full release.
Deliverable
Browser traffic is routed through the new tagging endpoint; live verification confirms events reach the test GA4 property.
Use the app to validate this step automatically.
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