Track UTMs on Privy Popups UTM attribution overview Privy 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 Privy campaigns on WordPress can use hidden fields filled by UTM Grabber. Steps Hidden fields on Privy signup campaigns 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 Privy UTMs via Webhook .