maloki is a user on mastodon.social. You can follow them or interact with them if you have an account anywhere in the fediverse.
If you don't, you can sign up here.
Good morning everyone and #Welcome to the fediverse here on Mastodon (or elsewhere).
In the federated timeline to your right you can see messages from the connected instances (ie other servers), but only from people who are already followed from this server. It's a neat "friend of a friend" system.
You can set up your own instance or find a better suiting one at http://instances.mastodon.xyz
Have a nice day!
