Can I add the user's email inside the URL as a variable like with UTM?

3. Have an option to enter the user email inside the URL as a variable like with UTM? like domain.com/?email=aaa@aaa.com that we will be able to track who the user without let them enter email.

Yes, you can add the email address to the form URL and prepopulate a form field.

Related Guide: Prepopulating Fields to Your JotForm via URL Parameters