Since there is no text search, hashtags are important to find other people, and for other people to find you.

#Writing tags I use:
#AmWriting - for the process
#FreeFiction - posted fiction, free to read
#TootFic - generally fits in 1-3 toots. Posted on Masto
#fantasy #scifi #romance #FDomme #MDom
^^^
I don’t think I get much traffic from these so I use them as descriptors
#Patreon (when it is)
#OneDollarPatreon (likewise)