Form Emails - How 'Send on edit' option works

2. Send on edit, I don't understand this feature. Why it exists.  I only want the customer to receive an email once they have completed and submitted the form. They can't submit the form until they complete al the mandatory fields.  If they start over and submit the same form again, I would assume they will get another email confirmation for the second submission. Please elaborate.

The form submissions can be edited by you, and by the form submitters if you share the submission edit links with them. The 'Send on Edit' option allows the users to receive the updated emails when their submissions are updated.

Yes, if they submit a new form, a new email will be generated. This is not affected by the 'Send on Edit' option.