Just wanna share a bit of advice to any writers that happen upon this...
Tags are the most important way to get your work out to viewers!
More people will find your fics if you use tags that people are searching for. Take a look at the top fics within the fandom you plan to write for and see what tags they are using and do something similar.
My suggestion would be to add the pairings (such as idol/character x reader/oc, show/band x reader/oc) as well as the genre (idol/band/character/show genre).
When I look up fics, I very specifically look up these types of tags:
“ateez fluff” , “changbin x oc” , “hxh x reader” , “billy hargrove smut” , etc
Broad tags like “kpop x reader” , “yandere au” , “anime angst” are a good idea, too, and tags such as “skz reactions” , “kny series” , “kdrama oneshot” allow readers to search for the specific format they want to read.
type in different tags and see what Tumblr recommends as “popular”
Others might be different in what they search, but in general I’ve found that when a fic doesn’t have these types of tags, they get less notes because less people are finding them.
As a side note, put the most important tags first (within the first 5) and also include alternate spellings / names for the people you’re writing for within the first 30 tags.
Final notes that might help...
Many people (myself included) skip over fics that are blatantly not meant to be in the tag they’re looking for.
i.e, please don’t tag BTS in your EXO fic, or Chisaki Kai in your Dabi-centric fic. Tumblr isn’t like AO3 - tag the main lead / relationship, not the other main characters that feature in the fic.
People search for both Seventeen and SVT so why not use both? Some people look up stage names while others use the idol’s real name. You have plenty of space so test out different tags and see if it helps.
While not necessary, creating a blurb at the top of your fic that includes the summary, word count, genre, pairing, and any warnings will let people know at a glance if it’s a fic they’d be interested in reading.
Clearly state when a fic contains dark content - it’s kinda fucked up to spring it on people without warning. It isn’t everyone’s cup of tea. Please be mindful of others.
Lastly, please please please use a read more! if your fic is longer than 500 words, or if it contains sensitive and/or explicit content (including triggers!). It’s the courteous thing to do, and might stop you from being blocked as some people will block authors that clog up a tag.
Some people will argue that smut and yandere fics shouldn’t be tagged under the general/broad tags (such as “miranda lawson” , “mcu” , “loona”). It’s up to you if you choose to add them to your fics.
IMO it’s fine, as people who don’t want to see such fics can use the in-built filter to optimise their online experience. But that also means you have to add tags such as “yandere vaas” , “smut” , “mafia au”. That way the filter will pick the fic up and hide it from those who don’t wish to see it!
I assume these tips work for member x member or character x character stories too! But I don’t read/write those types of fics very often so I’m not 100% sure how best to tag them!
Feel free to add onto this as I probably forgot something!