Nostr has the same content discoverability problem as other decentralized networks (Mastodon, Lemmy) in that if you're not connected to read from (not necessarily write to) the big popular relays, you end up missing content that doesn't seem to propagate.

  wss://relay.damus.io/
  wss://relay.primal.net/
  wss://relay.snort.social/
  wss://nos.lol/
  wss://nostr.land/

I've found through trial and error if you want to consume generic content like hashtags for animals (catstr, dogstr, etc.), art, photography and whatnot you really need to read from these 5 relays above; there's no right or wrong here and there are more if you're into coin stuff: https://stats.nostr.band/#relay_users

I'll mention if you want to see Mastodon bridged content there's also wss://relay.mostr.pub/ - I've found it has some unique hashtags not very popular on Nostr so if you're looking into niche content you might add this relay to produce more search results from that universe.

#nostr #relays