In Gravity Forms, a Notification is an email sent when a form is submitted — for example, to alert an admin about a new submission.
Open the Form
Go to Content > Gravity Forms and open the form you want to add a notification to.
Start with a simple first notification. Fill it out much like you would your confirmation.
Fill In the Basics
Fill in all of the basic information the notification needs.
Include Form Answers
To include information from the form, type your message and use the merge tag drop-down to pull form fields into the notification.
More Help
See the Gravity Forms documentation: Gravity Forms: Confirmations and Notifications.