Conversion tracking without the double-count.
Catch duplicate purchase events, drifted measurement IDs, and tags that send revenue to the wrong property. The bugs a GA4 report will never show you.
Conversion tracking breaks in three ways, and GA4 cannot tell you which one. Double-firing: two tags emit the same purchase event and revenue looks 2× real. ID drift: a tag ships a measurement ID that no longer matches your GA4 property, so conversions go to an old or wrong property silently. Tag-trigger mismatch: a key event is configured in GTM but never promoted to a key event in GA4, so Google Ads smart bidding is blind to it. GA4 only shows you events it received — not the ones it didn't, or the ones that arrived twice. You need to audit both sides together, which is exactly what GA4 × GTM cross-checks do.
- Extracts every measurement ID referenced anywhere in your GTM container and compares against the GA4 property you're auditing. Flags any mismatch before it costs you a month of attribution.
- Walks every key event in GA4 and looks for a matching GTM tag with the identical event name. Gaps and near-matches both flag.
- Counts distinct GTM tags firing the same event name. Two `purchase` tags → almost always a double-count bug.
- Checks that conversion-critical events (purchase, generate_lead, sign_up) are configured as key events in GA4 admin, not just sent as regular events.
- Generates the exact GTM tag configuration needed to fix each issue. Copy-paste ready.
Two GTM tags firing `purchase` event to the same container
Purchase count and revenue appear to be 2× actual in GA4 reports. Google Ads smart bidding receives doubled conversion signal and will overbid on campaigns optimized to purchase value. ROAS reporting is unreliable until resolved.
Identify which of the two tags is redundant (the audit surfaces both tag IDs and their triggers). Pause the duplicate in a shadow workspace first, verify the event count halves to expected in DebugView, then publish. Never disable the live tag directly.
Hire a web analyst. Or install one.
Conversion tracking is one of 10 high-stakes chores the agent covers end-to-end. Your first audit is free — and the agent keeps watching every night, so the next time conversion tracking drifts, you hear it from us before it costs you.