G-Suite (Google)

G-Suite (Google Apps for Education) is a suite of online productivity tools just like Microsoft Office.

Think of Holden and Ford - They both manufacture (or did manufacture) products that serve the same purpose.

Microsoft has their products that you would be familiar with, and Google has their version of the products.

Google Classroom is a part of the G-Suite that makes teaching more productive and meaningful by streamlining assignments, boosting collaboration, and fostering communication. Educators can create classes, distribute assignments, send feedback, and see everything in one place. Classroom also seamlessly integrates with other Google tools like Google Docs and Drive.

Google classroom also has the feature to include parents/guardians.

Google Classroom help page