Launching a funnel you can run ads against follows a set order: (1) connect Stripe, (2) create and attach a paywall product, (3) collect the customer email before the paywall, (4) optionally wire ad-pixel events, (5) connect a custom domain, then (6) publish and test. This is step 3. Before you start, make sure you have already connected Stripe and attached a paywall product to the screen where you sell. Once email collection is set up, your next steps are to wire ad-pixel events (optional) and connect a custom domain - which is required to publish for non-admin accounts, and is also the domain Apple Pay and Google Pay are registered against - before you publish and run a test purchase.