Google Classroom is now available to everyone with a Google account - not just those with gSuite for Education accounts. That means that, as well as enrolling and participating in classes, anyone can now create online courses.
As well as then obvious benefit for teachers, businesses can now take advantage of this tool for creating online course for staff.
I did a quick walkthrough of the service earlier and it's easy to use. You can add resources such as notes, videos and other media easily, and you can send and receive messages with students easily.
If you're looking for a quick and easy way to create online education programs, then Google Classroom is worth a look.
There's more information on the Google Blog.