Once upon a time, there were some people who believed that sometimes after a person dies, their spirit or "ghost" can stick around instead of going to heaven or to the other side. Sometimes, people say they can see or hear these ghosts even though they're no longer living.
Some people may have even experienced a ghost story where they felt something spooky, like hearing a noise that they couldn't explain or seeing something that wasn't really there. These stories are often meant to scare us a little bit, but they're also a way to explore what happens after we die and what we believe about the afterlife.
While it's not exactly scientifically proven that ghosts exist, many people still believe in them and enjoy hearing or telling ghost stories. Just remember that it's mostly just a make-believe thing, and it's important to stay safe and not get too spooked out!