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GTM Setup and QA (How to Test Tracking)

Goal​

Do not spend money until you can prove conversions fire correctly.

Step-by-step QA​

  1. Trigger the conversion yourself (test form submit, test purchase).
  2. Confirm the tag fires (Tag Assistant / GTM preview).
  3. Confirm the platform receives it (Google Ads conversions / GA4 events).
  4. Confirm it fires once (no duplicates).
  5. Confirm value and currency (e-commerce).

Common mistakes​

  • Duplicate conversions due to multiple tags.
  • Missing thank-you page triggers.
  • Tracking form start instead of form submit.

Mini-lab​

Write a "tracking test script" for your site:

  • action
  • expected event
  • where you will verify

Next Step​

Continue to Attribution and Conversion Lag (Do Not Panic Early).