@favus Sure... it works by having servers with users that talk to eachtoerh. When a user from one server follows a user from another ten the server becomes "Aware" of the other server and will pull in its tootts annd ultimately show this in the federated timeline as well.
You can block individuals or whole servers, this makes it easier to moderate without needing to worry about some servers having bad actors on it. You block the handful of bad actor servers (if you wantt) and have a nice clean timeline without needing to worry about banning people on an individual level.
In the end, it really isnt too much different than twitter on the surface, but behind the scenes it is a very different beast.