It’s a communications system and data layer for services and devices. You can use it for pub/sub, request/response, key-value and object stores, streams, work queues, and much more.

You can instantiate and connect multiple nodes to create clusters, and clusters to clusters to create superclusters.

For example, you can use it as the backbone or message bus for a microservices architecture, or to interconnect IoT devices, to create chats, as a secondary transport for Nostr.