Okay kiddo, so Stephen King is a writer who has written a lot of books and stories that people like to read. Some of those stories are really short, like just a few pages long, and those are called "short fiction."
A bibliography is like a list of all the things that a person has written or made. So a Stephen King short fiction bibliography would be a list of all the short stories he has written.
You might be wondering why someone would make a list like that, but it can be really helpful for people who want to read all of Stephen King's stories. They can look at the list and make sure they haven't missed any.
Some of the stories on the list might be ones that you've heard of, like "The Mist" or "The Body," which was turned into the movie "Stand By Me." But there are also a lot of stories that you might not have heard of before.
Overall, a Stephen King short fiction bibliography is just a way for people to keep track of all the creepy, scary, and sometimes funny stories that he has written over the years.