After collecting the information from the user, you have the option to display a confirmation message or redirect them to a different URL:
A Success Message is simply what your form will display after a visitor subscribes. This is a quick, clean way to present a confirmation before the user dismisses the form.
Alternatively, a Redirect URL will take the subscriber to another page of your choosing. This is great if you have a customized thank-you page or special unlocked content.
Setting up a Success Message
Edit the campaign form and navigate to the Design tab.
Above the editor, click the Success tab.
As with the base form, use the WYSIWYG editor to customize the messaging and styling.
Finally, remember to publish your changes when finished.
Setting up a Success Redirect URL
Edit the campaign form and navigate to the Success tab.
Enable the Redirect URL option via the toggle.
Enter the destination URL. In most cases, there is no need to pass the email address (more on that feature below).
Publish your changes.
Passing subscriber's email address to the redirect destination
This is a bit of an advanced feature and is not required to use the Success Redirect URL option. However, sometimes it is useful to include the subscriber's email address as a parameter. You can opt to pass the email address to the destination via GET or POST.
For details, see the full article on passing email addresses to a Success Redirect URL.