Duplicate purchases in GA4 - why they happen and how the auditor finds them
Duplicate purchase events distort revenue reports. Here is how the auditor detects them via second buckets - and how you prevent them.
Tracking Quality
Event schema, (not set), unassigned traffic, custom dimensions and user-ID setup for reliable GA4 data.
Pillar article
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Event quality & PII warnings
How the Auditor detects event schema errors, PII risks, (not set) shares and duplicates in GA4 - with thresholds straight from the code.
Blog articles
User-ID-Coverage - was 20 % Login-Quote über deine Cross-Device-Realität sagen
User-ID-Coverage ist die unsichtbare Größe hinter Cross-Device-Tracking. So misst der Auditor sie und so verbesserst du sie ohne Login-Zwang.
Unassigned traffic in GA4: finding and fixing the causes
What does Unassigned mean in GA4 and how do you get rid of it? Causes, fix and the distinction from (not set) - with an automatic check in the GA4 Auditor.
Custom dimensions in GA4: setting up and auditing
What are custom dimensions in GA4, how do you set them up and which mistakes does an audit find? Event- vs. user-scoped, limits and cardinality explained.
Help articles
Tracking debugger walkthrough
How to find and fix tracking errors with GA4 Auditor.
Tracking OnPage Check for GA4: tags, consent and dataLayer
Checks directly in the browser whether the GA4 tag, consent signals and dataLayer load cleanly on a page. Part of the GA4 audit - not an SEO on-page tool.
Session quality & bot filters
How the Auditor detects sessions without session_start, bot traffic indicators and session restarts - with thresholds.
Live Check - fast GA4 API diagnostics
What the Live Check inspects across the GA4 Admin and Data API, which thresholds apply and how to interpret the issues it finds.
Server-side tracking analysis - the SST score
How the Auditor calculates a score (0-100) for the value of server-side tracking - cookie lifetime, attribution gap, funnel duration and cross-domain.