How to Register a Drone for Recreational Use:
Registering your drone is quite simple and only necessary if you have a drone weighing between 0.55 lbs to 55 lbs. To begin, click this link that takes you to the FAA drone registration page. Once there, click the register button and fill in the required information. After that the FAA drone registration certificate will be emailed to you and you will receive a number to mark on your drone. The FAA will communicate any further registration requirements directly with you. You may also have to pay a $5 fee.
Screenshot from faadrone.org
How to Obtain a Drone License for Commercial Use:
A drone license is only necessary if you are using your drone for commercial reasons (for work). If you are interested in obtaining a license click here to learn all the steps to do so.
Screenshot from dronepilotgroundschool.com