ELI5: How does Lemmy operate?

https://lemmy.ml/post/1180504

ELI5: How does Lemmy operate? - Lemmy

Would be helpful for most new users to understand how Lemmy works and how the different hosts interact with each other in a basic way.

It's Reddit but federated. A federated service is one that works like e-mail, i.e. there are multiple providers/servers/instances but all of them are connected so it doesn't matter which one you choose. Additionally, Lemmy is federated to other services (e.g. Mastodon), forming what's known as the Fediverse.
Thank you! Good answer. ~___~
What's the difference between the multiple lemmy instances and something else also ActivityPub based like kbin? Is lemmy.ml vs lemmy.world the same as comparing lemmy.world with kbin.social? I have accounts with both Lemmy and Kbin and confused a bit by what I'm seeing, and also Threads vs Magazines vs Microblogs haha. So much to learn about the fediverse!
Well, the software they run is different. The frontend looks different, etc. Lemmy can connect with kbin, as well as Mastodon, so it's just one big network at the end of the day.