When someone fills submits your form and then verifies their email, they will be directed to a confirmation page with your custom Thank You message. This page shows them that their form submission was successful, but it's also an important communication opportunity.
You can edit your message in the Thank You tab of your form. Don't forget to let volunteers know when they can expect to hear back from you and what happens next!
You can also create a custom Thank You message for each event or assignment that you've attached the form to, in the activity's Sign up tab. The activity Thank You message will override the general message added in the form's Thank You tab, when people sign up for the activity.