Open your GA4 traffic sources report. If PayPal, Stripe, or Klarna is sitting near the top, your instinct might be to dismiss it as a quirk. It is not a quirk. It is GA4 telling you that every ad-driven sale routing through that payment gateway has lost its original campaign attribution — and your ROAS … Read more
Check your GA4 acquisition report. If PayPal, Klarna, or Stripe is showing up as one of your top traffic sources, your WooCommerce tracking has a structural break. 62% of WooCommerce stores run GTM (SimilarTech, 2025), and the majority are using payment gateways that silently destroy GA4’s cross-domain linker on every checkout redirect. The problem isn’t … Read more
You configured cross-domain tracking. You added your checkout subdomain to GA4’s list. You watched the _gl parameter appear in Tag Assistant. GA4 still shows checkout.yourstore.com as your top referral source — and your ad campaigns are getting credit for nothing. Here’s the architectural reason every setup guide leaves out: GTM’s cross-domain linker only fires on … Read more
