The Form Submission code area in the Tracking Pixels section allows you to redirect registrants to a designated website/webpage after they fill out the form. 

Here’s how to set it up:

1. Login to Goldcast Studio and open your preferred event. 
2. Click Registration → Tracking Pixels & Tags on the left sidebar.
3. Scroll to the Form Submission section and click the Edit button. 
4. Enter the following code snippet here:

window.location.href = "https://www.example.com/"

5. Replace the URL in the above example with the URL to which you want to redirect registrants. 
6. Click Save. 

For example, this code snippet 

window.location.href = "https://www.goldcast.io/" 

redirects registrants to the Goldcast website once they submit the registration form.