Cherry Seed

How do I measure my actual data loss?

measure tracking data loss conversion data audit tracking accuracy measurement data loss calculation analytics audit conversion tracking audit tracking discrepancy measurement

Quick Answer

Compare your backend transaction data (from your database or payment processor) against what Google Analytics reports for the same period. The gap is your data loss. Less than 5% missing is lucky; 10% is excellent; 20-30% is common; and with GDPR consent requirements, 50% loss is normal if half your visitors decline tracking. Look for patterns in the missing data — specific payment methods, device types (iOS loses more), or browsers (Safari) — to identify the root cause.

Full Answer

You can't fix what you don't measure. Before implementing solutions, quantify your current data loss to establish a baseline and track improvement. The Basic Formula Example:

  • Shopify orders this month: 1000
  • Facebook reported purchases: 650
  • Data loss: (1000
  • 650) / 1000 = 35% Step-by-Step Audit Step 1: Gather Backend Data Pull from your source of truth:
  • WooCommerce orders report
  • Shopify orders export
  • Payment processor transactions
  • CRM closed deals Important: Use completed/paid orders only, matching the platform's conversion definition. Step 2: Pull Platform Data For each platform, export conversions:
  • Facebook: Events Manager → Aggregated Event Measurement
  • GA4: Reports → Conversions
  • Google Ads: Conversions report Match the time period exactly. Step 3: Calculate Per-Platform Loss Step 4: Analyze Patterns Look for:
  • Which platform has worst capture?
  • Does loss vary by day of week?
  • Mobile vs desktop differences? -...

Sources

Programmatic Access

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Cite This Answer

Cherry Tree by Seresa - https://seresa.io/seed/data-loss-adblockers/measure-actual-loss