With the nostr:npub120zh308gs69j3vwgvvrzgglv58vsk3q0vef43uajyu0lc3mtldsq2p33r2 url shortener, you could share a post url with less than half the characters in some situations

For example lol:

pixelfed.furryfandom.me/p/terrencefoxfur/555811865973597526

would be shortened to

px.lfed.co/32/e2o_KBTaVW

Groups will also use this to have easily recognizable and short sharable links!