Quick answer

Audit the full customer journey: source → landing page → interaction → key event → qualified outcome. Check that important events fire, have useful parameters, are not duplicated and map to a documented business definition.

A tracking audit should include the website, analytics property, ad platforms, CRM or booking system and reporting layer.

What I would check first

List the primary business actions and the technical mechanism for each: form submission, phone click, appointment completion, purchase or other outcome. Then test each path in a clean browser on mobile and desktop.

Compare the recorded event with the real-world record. If analytics reports ten submissions but the inbox has four genuine enquiries, the measurement or lead-quality definition needs attention.

Decision framework

Classify events as primary conversions, supporting events or diagnostic interactions. Only primary actions should usually drive advertising optimization, while supporting events explain behaviour.

Keep names and definitions stable. If a business changes what counts as a lead, document the date and avoid comparing incompatible historical periods without explanation.

Implementation steps

Create a measurement dictionary, test duplicate firing, verify consent and attribution behaviour, document ownership and add annotations for site or campaign changes. Re-test after forms, templates, redirects and CRM integrations change.

Use a small QA script that a non-technical stakeholder can follow. Repeat the highest-value checks after every major release.

Current platform considerations

Google Analytics distinguishes key events from Google Ads conversions. A key event identifies an important action in Analytics; an Analytics key event may be used to create a Google Ads conversion when appropriate for advertising measurement and bidding. citeturn580680search0turn580680search1

Because platforms can use different attribution and counting logic, document which system is authoritative for each business question instead of forcing every report to match exactly.

Measurement and business implications

Report the hierarchy clearly: traffic, engaged visits, key events, qualified outcomes and customers. Use the weakest reliable layer for decisions and label assumptions when downstream data is unavailable.

Pair this audit with the Google Ads/GA4 discrepancy guide, the beginner GA4 guide and UTM tools.