Hey there Neil! 👋
There are many kinds of groups on here.
At the moment the most common kind of group is running on Guppe software, where it simply repeats posts sent to the account. There's no moderator as such, but because the posts are all hosted on servers they are subject to moderation by those servers.
For example if you see something unsuitable or spammy, you can report it just like a non-group post.
More info about groups at https://fedi.tips/how-to-use-groups-on-the-fediverse/
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