explain nostr and its clients to me like i'm 5 years old
Nostr is a platform that helps people manage and store their cryptocurrency. Basically, you can think of it like a digital wallet for your cryptocurrency. It is a secure and easy way to store cryptocurrency and allows clients to make transactions with each other quickly and safely.
Nostr is a service that helps people keep track of their digital stuff. Clients are people who use Nostr to organize things like their documents, photos, and messages. Clients can use the service to easily find their things, so they don't have to search around all the time.