You can choose which notifications you receive for all of your classes. For example, you can turn off invitation notifications for all classes but keep assignment notifications on.
Go to classroom.google.com.
At the top, click Menu .
Click Settings. (You might need to scroll down.)
(Optional) Next to Receive email notifications, click the switch to On .
Click any notification to turn it on or off.
Read the tables below for a description of each notification type.