What makes Google Classroom unique is you would begin to feel like you are in an actual class. This can be used by educators who would like to constantly update their students if in case there are assignments and projects that need to be submitted. The teacher may sometimes use the announcements section of the web page so that you can be updated with the things that you have to know.
There may be links there that will help you learn more about the available topics that you want to learn. Google Classroom will allow the teachers to see if the students are able to finish all of the tasks. It will constantly update so that communication can be easy.