Track UTMs on Funnelish Pages UTM attribution overview Funnelish UTM Tracking Integration only records UTMs that land on the checkout URL at purchase time. UTM Grabber keeps them in cookies on your site. This page explains how to pass that data through before the customer pays. What to expect Funnelish checkout pages need UTMs on the URL or in hidden fields. Steps utm-out from WordPress into Funnelish links Custom JS on funnel steps for handl_utm Append UTMs with utm-out Buy now UTM Grabber rewrites the link with cookie values. Details: utm-out class guide . For webhook-based attribution after purchase, see Send Funnelish UTMs via Webhook .