A Guide to Using the "Inspired By" Function on AO3
The "inspired by" function allows writers to display fanfics that inspired their own fanfic neatly in the "notes" section via a link. It is used to credit inspiration, for archival purposes, and also for translations, remixes, and podfics.
It is a very fun function because it encourages community, and even gives your readers something else to read while they wait for your own fic to update. It can help people who really like a certain trope or writing idea easily find another fic just like it. And, if you use the function, the writer you are inspired by can choose to link it back to their own fic. So, at the end of their fic it will say, "works inspired by this one," and list yours.
"How can I tell if I should use the "inspired by" function or not?"
You should use the inspired by function if you are directly inspired by another fic. I have done this twice, and it is splendid. One of my besties and I have fics that are attached by this function. It's like they're holding hands via "inspired by" links :' )
If you read a fic, and at the end you're like, "Wow, this was totally radical, and now my gears are turning with an idea just like this one, but I'm gonna add my own spin to it." That would be a moment that calls for the "inspired by" function.
A situation that doesn't call for the inspired by function is two fics that are similar in trope, but the second one was not inspired by the first. For example; let's say person A writes a coffee shop AU fic, which is a very common trope, and person B also writes one, but without having ever read person A's fic, or without directly getting the idea directly from person A. Person B was not inspired by person A.
Let's say person B did read the fic, then also eventually decided to write a coffee shop AU that was completely different, and had very little in common with A's fic. That would not be a moment where the "inspired by" function would be necessary. B could use their own judgement to gauge how inspired they were by A's fic.
But, let's say person B really, really loved person A's fic, and wanted to show everyone another coffee shop AU. Person B very well could still use the "inspired by" function just to have the link. Or, they could just link the fic in their "Notes" section, but i personally think the inspired by function is a little easier than creating a "notes" link on ao3 LOL.
However, I have seen some people just list a fic they are inspired by in the notes section without any issues, but I encourage people to use the inspired by function. If you're unsure, maybe ask the author that you're inspired by if they care. If you ever don't use the "inspired by" function, and step on another writer's toes, just simply talk it out and credit.
"But, Mermaid, if I use the "inspired by" function, won't it look like my fic belongs to the original person?"
No?? I am including this because I've seen a surprising amount of people say this and it bugs me. If you use the "inspired by" function, it links the fic you were inspired by in the "notes" section in first chapter. That's it. It doesn't say, "this fic belongs to this other writer," lol. It says, "Inspired by (insert fic) by (insert author)," one single time. After that, it will not be listed in future chapters. Your name will always be on it, and it will only be listed on your account like usual.
To conclude, you should use the "inspired by" function if you are directly inspired by another person's fic. if you're not, then don't use it. Easy peasy. I encourage its use because it's very fun, it is part of fandom etiquette to use it when needed, it allows people to recommend fics similar to theirs, credit another person's idea they used, etc.