How can I make the Submission Verifier App work?

Can someone give me a detailed instruction on how I can make it work? Where do I need to include the link that I generated from http://subverifier.jotform.io/??

To open the Submission Verifier app instructions please click on a [Help] link within the app.

The verification link is usually added to the email autoresponder template.

Example:

In case you just need to confirm the users' email addresses, we have implemented a user-friendly E-mail Validator widget.