What is a Success URL?
After creating a new form, you'll reach the "Form Setup" step in the wizard. This is where you can define the Success URL (as shown below). The Success URL is the web page where subscribers will be redirected after opting in through your form. It can be a thank you page, a download page, or any other relevant destination.
To set up the Success URL, simply enter the desired URL in the field. Make sure to use the complete URL, including the "http://" or "https://" prefix.