Google Tag Manager

What Stevin gets out of Google Tag Manager

GTM is not a marketing tool, it is tracking infrastructure. Most accounts treat it as 'the place where the marketer adds tags without a developer', which is technically true but leads to messy containers: 80 or more tags nobody can trace anymore, duplicate triggers, conflicting variables. We start every audit with a container clean: which tag is there and why, which still work, which pollute the signal. A clean container is a better ROI investment than a new campaign.

What you pair it with

Server-side GTM is the standard in 2026, no longer optional. It solves three problems at once: data loss from browser restrictions (Safari ITP, ad blockers), latency on your site from fewer client-side scripts, and first-party data ownership instead of data that gets grabbed by 30 vendor pixels. We host server-side GTM on your own subdomain, not on Google's servers, so your data really sits in your stack.

Common mistakes

• →Sticking with client-side GTM while your conversion match rate is already dropping below 60 percent
• →Using custom HTML tags for vendor pixels that do have a native template, more maintenance, no gain
• →Tying triggers to CSS classes the developer changes in a month, tracking quietly fails
• →Deploying a container without versioning or a preview-mode test, broken tracking goes live