More historical background info (from
https://hiverhq.com/blog/alternative-google-groups):
"Say you’re a vermiculture enthusiast and you’re looking to find fellow
vermiculture enthusiasts. Today, you could simply head to r/vermiculture on
Reddit. Or find relevant communities on Facebook and Twitter, But if you were
into vermiculture in the 1980s and 1990s, you had to rely on Usenet newsgroup.
Simply put, these were one of the first-ever online communities – in the early
days of the internet – that allowed users to post threaded messages in a
single location.
Usenet newsgroups still exist, but they’re just not as popular as, say, Reddit
or Twitter.
In 1995, a web-based archive of Usenet posts was created by Deja News Research
Service. It became the talk of the town owing to its powerful search
capabilities. Google acquired them in 2001 and rebranded the archive into
‘Google Groups’. Soon, the platform expanded beyond just accessing Usenet
archives, allowing users to create their own discussion groups and forums.
Google Groups is a service provided by Google that enables people to create
online discussion groups and communities. It can be used for a variety of
purposes, such as professional networking, support forums, interest-based
communities, project collaboration, and more. It serves as a platform for
people to connect, share knowledge, and engage in meaningful discussions with
like-minded individuals or within specific organizations"