The Data Layer is Critical
Don't scrape the DOM for variables (like price or product name). Implement a clean Data Layer push from your backend so GTM can reliably pass data to Google Ads and Meta.
Server-Side Tagging (sGTM)
In a world of ad blockers and Safari ITP, move your GTM container to the server-side. This speeds up your website (less third-party JS) and ensures data tracking accuracy.
Testing and Workspaces
Always use the Preview Mode to debug tags before publishing. Use separate workspaces if multiple marketers are working on the container to avoid overriding changes.