I often browse /all, come across a post that looks interesting but I have no clue what’s it about, so I check the sidebar - and all I find is “An unofficial Lemmy community for X”, " A place to discuss everything about X", or the best kind, “A continuation of r/X from Reddit”.
Can’t people write just some basics? What is that thing, a TV show, a music band, a sports team, a tabletop game? Sometimes I really can’t tell even after looking at a few posts.
Your community may be of interest to someone who stumbles upon it, not only to diehard fans.
I know sometimes that’s the joke, but most times it would be simple to just use a few words. “Discuss X, a Zimbabwean spy-thriller public theatre show.” There we go, now everyone knows what it is.
You might be able to make a [Meta] post in said community and ask for the sidebar to be expanded. Who knows, maybe it’ll work.
I’ve commented to a couple where e.g. there was a sticky of the mod asking what people want (but still no description), but sometimes I’m lazy and just want to browse :p