Do you remember Buffy the Vampire Slayer? It was a super cool TV show about a teenage girl who fought against vampires, demons, and other monsters to save the world.
Well, some grown-up people who love Buffy started a thing called "Buffy Studies," where they study and talk about all the different parts of the show. They read and write about the characters, the plots, and the messages that the show gives us.
It's like when you have a really cool toy, and you love to play with it so much that you want to learn everything about it. The people who do Buffy Studies love the show so much that they want to learn everything there is to know about it!