- a system for managing group-based access for Google Workspace users, e.g. share a Google Doc with a group to give all members access
- a system for managing group-based access to Google Cloud Platform resources, e.g. share a BigQuery table with a Google Group to give all group members access to it.
- a simple way for Google Workspace users to create shared email addresses. e.g. support@mycompany.com
It serves these purposes quite well.