FYI, Google Groups are literally the “groups” of Google Workspace — every time you create a group of users to e.g. assign that group some GCP roles, that group then also gets an email address (that being the group’s global primary key), and that email address then implicitly becomes a mailing list all group members are subscribed to.

It’s actually very useful in a corporate Google Workspace context — it’s rare to need an actual mailing list given Slack et al, but they’re effectively “group email-forwarding aliases”, allowing messages to e.g. [email protected] to arrive in the inboxes of multiple people.