When you post (usually called a "Note") on Nostr, the way it works is quite different from regular social media:1. How does a post work?No censorship: No company or middleman can delete your post. Even if one server (Relay) blocks you, your post will still be there on other relays.Cryptographic Sign: Each of your posts is signed with your unique "Private Key". This means that no one else can make a fake post under your name, and it is proven that the post is yours.2. The role of RelaysThere is no central database on Nostr. When you post, it goes to different Relays (servers). You can choose which relays you want to send your post to and where you want to see other people's posts from.