Well you see, there are notes and other stuff and they're all transmitted by relays. nostr:nprofile1qqsd6ejdteqpvse63ntf7qz6u9yqspp4z7ymt8094urzwm0x2ceaxxgprdmhxue69uhhg6r9vehhyetnwshxummnw3erztnrdakj7qgmwaehxw309a3ksunfwd68q6tvdshxummnw3erztnrdakszyrhwden5te0dehhxarj9ekxzmny7dky6k is an expert on explaining this.