Asking that I realize there is no central server in nostr, which makes push notifications complicated, so the clients should pull. Am I correct?

nostr:nevent1qqs03gpxugsfzcrx06vjpl0e7e9thwtjxhapufyc0gycr4ln4wawllcppemhxue69uhkummn9ekx7mp0qgst74rzpf8qptr2e7v9n65hqztf2c5gu7f0fdjp7ymjyp8d2ut4n0grqsqqqqqp2zen3e