AnalyticsGA4 analysisIntermediateBuilds a checklist

GA4 sudden traffic or conversion drop triage

A structured triage that separates tracking and measurement problems from real demand changes, in the order a careful analyst would check them.

For: Performance marketers, Marketing analysts, Growth marketers · Works with: Google Analytics 4, Any capable chat model (ChatGPT, Claude, Gemini, others)

Public beta. This prompt was drafted with AI assistance and checked by automated rules, but it has not been reviewed or tested by a person yet. Treat it as a starting point and check the output. It is hidden from search engines while in beta. Use the “Was this prompt useful?” box to tell us what works.

Your prompt

Act as an analytics debugger. sessions from Organic Search dropped by roughly a third starting 9 October 2026. Context I know: we launched a new cookie banner on 8 October and updated the site header. Data I can provide: GA4 reports, Search Console, server logs. Produce a triage plan in this order: 1. A short list of questions to answer first to decide whether the drop is real or a measurement issue (tag firing, consent banner changes, filters, property or stream changes, bot filtering, data delay, attribution changes, sampling or thresholds). 2. For each candidate cause: how to check it in GA4 and elsewhere, which reports or exports to use, and what result would confirm or rule it out. 3. A comparison plan against independent sources I may have (server logs, ad-platform clicks, CRM or order data, Search Console). 4. If the drop appears real: segments to break it down by (channel, device, landing page, geography), noting that correlation in segments is not proof of cause. 5. A list of what you cannot conclude without more data. Rules: do not invent causes as facts; state assumptions; do not guess numbers. If information is missing or not provided, list what you would ask for. Recommend checking each finding against a second source before acting.

Customize

The fields start with example values so you can see how the prompt works. Everything stays in your browser.

What dropped.

Your description; no numbers are invented.

When it started.

Changes you know about.

What you can check.

Example of what to expect

Illustrative only. It describes the kind of result this prompt aims for; real output varies by tool, model and run.

An ordered triage plan: measurement checks first (tags, consent, filters), then independent-source comparisons, then segmentation, with confirm/rule-out criteria and a 'cannot conclude' list. (Illustrative.)

Expected format: Numbered triage checklist with how-to-check notes.

How to use it

  1. Work through the plan in order.
  2. Record what you find at each step.
  3. Compare with at least one independent source before concluding.

Limitations

  • This cannot diagnose anything without you running the checks.
  • Consent and privacy settings can legitimately reduce measured traffic.

Platform notes

Google Analytics 4

Official docs read · checked 2026-10-11

GA4 exports and the interface can differ (sampling, thresholds, attribution, data freshness). State which one your numbers came from.

General notes on Google Analytics 4
  • The BigQuery export has daily events_YYYYMMDD tables and intraday tables; intraday lacks some fields, and late-arriving data can update a daily table for up to 3 days.
  • Exported data and the GA4 interface can differ; the export documentation links to separate comparison articles that we did not read.

Any capable chat model (ChatGPT, Claude, Gemini, others)

Official docs read · checked 2026-10-11

Works in any capable chat model. Paste a small anonymised export and recompute the key numbers yourself: chat models can misread columns or miscalculate.

General notes on Any capable chat model (ChatGPT, Claude, Gemini, others)
  • These prompts are plain text and work in any chat assistant. For analytics prompts, paste a small, anonymised export; a chat model can misread columns or miscalculate, so recompute key numbers yourself.

Source, license and attribution

Origin
Original by MarketerTools
Publisher
MarketerTools
License
Original work by MarketerTools, free to copy and use. Informed by the linked documentation; no third-party text is reproduced.
Platform assumptions checked
2026-10-11

Documentation and references behind this prompt

These informed the structure and the platform notes. A reference is not a license, and no third-party prompt text is copied here.

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