Easy Forms offers two types of emails that can be sent after the form is successfully submitted: Email Notifications and Confirmation Emails.
Email Notifications are intended to be sent internally to alert and/or deliver the submission data to the form owner or
Confirmation Emails are intended to be sent to the form submitter to confirm him that the form has been submitted successfully. He can receive his own information submitted on the form, he can confirm that information by clicking in a link, he can edit the submission or instead, this type of email can be used to thank the user for submitting the form.
To make it short, the main difference between boths type of emails is that Confirmation Emails need at least an Email field to define the email address where the email will be sent.
If you want to send different emails based on user answers and conditional logic, take a look at our Conditional Emails add-on.