I just have two questions,
1-What kind of website is this?
2-What is it's main purpose?
I'm sure I can figure out everything else!
Hmm, how do I explain it. But here goes.
First, this is a website where you can post something. It can be just a simply comment, or something with content in it, like posting an art, playthrough video, or literally anything (just make sure it didn't violate the rule here, that's fine), and if people like it, you might get a reaction from it. In here, you can also gain title (the text below your username). The title you will get is depends on how much post you've made, reactions you have accumulated, or how long have you been the member of this community, and others. Here, unlike YouTube, IG, or FB, that separates the content and its comment, here, it's kinda mixed up, so after you post your content, then people comment it, you can post another content below it. Just like a chat room, but it focuses more on content posting.
Second, the purpose of this website is to share and discuss, or... just to find friends to talk. You can make friends here, you ask question (just like what you just did), you can share your stuffs (art, builds, suggestion), or you can discuss something (Terraria lore, you know, and any other else).