So I've been hearing alot of talk about Discord. "New to this game? Go to Discord!" "Before you do anything else, go to Discord!" etc.

But I've never actually seen a link or anything that proves that this Discord (whatever it is) exists. I've been playing this game for a couple of months and only today I decided to try and find my way to Discord. I don't even know what it is, a different forum, a walkthrough, a picture of all flower knights, etc.? I finally found it (had to search for about 5-10 minutes) but I've no idea what I'm looking at. How is it connected to Flower Knight Girl?

Can anyone write up a tutorial for Discord and explain what it is and how to use it? I mean, if I (have been using computers for 20 years) can't figure it out then I'm sure alot of other people can't figure it out.