Currently, a Nostr user who wants to access their timeline is encouraged to use many relays. This consumes a lot of resources on their device, internet connection, and also on the relays. Nip65 is a type of ephemeral note informing about the relays on which an application listens and writes. This note being very light, it can be transmitted to many relays. When an app supports this NIP, instead of listening on many relays, it will simply listen on the relays of the people they follow. This NIP makes clients smarter and help to better scale Nostr