Nostr is an open, decentralized protocol for censorship-resistant social networking, meaning no single company controls it.
It uses public-key cryptography for user identities and a network of independent servers called relays to transmit data, allowing users to communicate without needing permission from a central authority.
Unlike centralized social media, Nostr allows users to switch between different client applications while keeping their identity and data, which is not tied to any specific platform.