The Email Field accepts a text email address. The Email Field is most useful when it's important to validate that the email address is usable and does not contain any obvious errors.
Data will be stored as simple text with the email address that was entered on the content entry form.
If accurate data entry is not a concern, then consider using a simple text field for your project.
Content Entry Form
The form will be validated and will only accept a "Fully qualified domain address". The screenshot below shows an email field that is failing validation when the form is submitted.
This field may be set to repeatable during field creation to collect more than one email address at a time.