Form Emails - How the 'Update Email' option works

4. Update Email in the Advanced section. I have no idea what this selection option means. 

When the 'Update Email' option is enabled, the email template will auto-update on any form changes. For example, if you add a new field to the form, it will be automatically included in the email template. When the option is disabled, the form changes will not be reflected in the email template.