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The single most common false alarm in EU ad accounts: “Google Ads shows 10 clicks but GA4 only 3 sessions — my tracking is broken!” Usually it isn’t. AdLoop’s analysis tools understand this; here’s the background.

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The mechanics

  • Google Ads counts every click. No consent needed; a click is a click.
  • GA4 only records users who accepted analytics cookies. Visitors who reject or ignore the consent banner are invisible to GA4.
  • In EU traffic, 30–70% of users typically decline. A clicks-to-sessions ratio of 2:1 to 5:1 is normal, not broken tracking.
  • Conversion counts are affected the same way: your true conversion rate is likely higher than GA4 reports.

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What AdLoop does about it

The cross-reference tools (analyze_campaign_conversions, attribution_check) factor consent gaps into their analysis and say so in their insights, so your AI doesn’t misdiagnose normal EU consent behavior as a tracking bug. Genuine tracking issues (zero sessions across all traffic sources, missing events, paused GTM tags) are still flagged, and the three-way tracking audit pinpoints them.

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When to actually worry

  • GA4 shows zero sessions from paid traffic while organic looks normal: check UTM parameters and GA4 filters.
  • Events fire in the browser but never arrive in GA4: run the tracking audit (audit_event_coverage) across your website code, GTM container, and GA4.
  • Sites with Google Consent Mode v2 send cookieless pings even without consent, which narrows the gap; if your numbers are closer than expected, that’s likely why.