Real ID Act

Starting October 1, 2020, every US state and territory resident will need to present a Real ID-compliant license/ID or another acceptable form of identification (like a passport or passport card) for accessing federal facilities — including boarding commercial airplanes.
If it is Real ID compliant, there will be a star in the top right corner; many drivers may not realize they already have one, since some states have been issuing them for a few years.

You need a Real ID if:
• You want to fly with only your state-issued ID
• You do not have a passport or another TSA-approved ID
• You need to visit a secure federal facility, such as a military base, and do not have a military ID

Incidentally, a Real ID is not a substitute for a passport for international travel.