The Happy TaggerThe Happy Tagger
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Built to make GTM click.

Easy preview and debug tools, auto-event practice, and a friendly interface that helps you manage tags. 15 modules across 91 hands-on lessons.

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Lessons that behave like real sites.

Every lesson is a realistic page that pushes clean events, so what you practice is what you will actually tag at work.

  • Realistic lesson pages: shops, forms, modals and SPAs
  • Bring your own GTM container and see changes instantly
  • Guided courses from fundamentals through server-side
Course · GTM Fundamentals
  • Intro to the dataLayerComplete
  • GA4 page_view eventComplete
  • Click triggersIn progress
  • Scroll depthLocked

2 of 4 lessons complete

Practice the full surface of GTM.

Triggers, variables, custom events and templates. The everyday building blocks, rehearsed until they are automatic.

  • Clicks, scroll, timers, visibility, form and history triggers
  • Built-ins, dataLayer variables, the DOM, lookup tables and cookies
  • Modals, tabs, async loads, SPA pageviews and third-party templates

What you build in your container

TriggerClick · All Elements
VariableDLV · event_category
TagGA4 Event · add_to_cart
Container published live in seconds

See exactly why a tag fires.

Debug with GTM Preview and Tag Assistant, then confirm your work with a per-lesson check.

  • Watch tags fire and the dataLayer fill in real time
  • Per-lesson verification so you know when you have it right
  • Progress tracking so you can pick up exactly where you left off
Tag Assistant · Preview mode active
  • gtm.jsFired
  • GA4 ConfigurationFired
  • GA4 · add_to_cartFired
  • Ads ConversionNot fired
Lesson check: 3 of 4 tags verified

Ready to practice GTM for real?

Load a container, pick a course, and start tagging. No signup, nothing to install.

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