Google Analytics Audit Test #

A GA4 audit is essential for uncovering missing insights—key data points that organizations don't yet know and can act upon. A well-done audit evaluates both behavioral tracking and traffic attribution, ensuring each is accurate and useful. It also assesses whether the data collected truly supports business decisions and reporting.

Test Detail

This test checks whether any ecommerce transactions are recorded with a "(not set)" Transaction ID, which often results from improper tagging or duplicate hits.

A Transaction ID should be unique per purchase, allowing proper deduplication and accurate revenue reporting.

Fixing 'purchase' events with (not set) items

• Use the recommended push to the dataLayer, ensuring the items array is complete:

    gtag('event', 'purchase', {
      transaction_id: 'T12345',
      currency: 'USD',
      value: 129.99,
      tax: 5.00,
      shipping: 10.00,
      items: [
        {
          item_id: 'SKU_789',
          item_name: 'Noise-Canceling Headphones',
          quantity: 1,
          price: 129.99
        }
      ]
    });

QA Tips

• Check your purchase tag in GTM or codebase to ensure a valid transaction_id is always passed.
• Ensure the transaction_id is populated server-side (if using server-side tracking).
• Watch out for race conditions that might cause ecommerce hits to fire without the correct data.
• Hire a pro to fix the problem accurately and preserve your revenue data.