1- You can get report about all created classes in your domain with the following details:
Class Owner
OwnerId
Organization
Creation Date
Last Updated
Course State
Course Section
Course Name
Enrollment Code
Course Id
OrgUnitPath
Class Link

2- You can get a detail report for a single course with the following details:
Teacher & Co-teachers' Names
Teachers ID
Teachers Email
Material Title
Material Type
Creator User ID
Creation Time
Material Link
Teachers Folder

3- You can get report about the Google drive usage with the following details:
Time
User
Document Type
Title

4- You can get a report about the user usage with the following details:
Date
User
Last Login
Num Emails Received
Num Drive Files Created

You will get a hyperlink for the created reports or you can find them in your google drive.
This is a spreadsheet add-on, that means extracting reports can be done by installing the add-on using a spreadsheet.