How to get email notifications with the form response when a user submits the form?

You can keep track of form responses by enabling "Get email notifications for new responses" in Responses tab. If you want to notify multiple collaborators or receive the form response in the email, you can use Mailrecipe for these notification emails.

How to send notification emails to collaborators?

Pre-requisite: You must have installed the Mailrecipe add-on for Google Forms. If you haven't installed the add-on yet, you can install it from G Suite marketplace using this link.