An epilogue is like the part at the end of a story where the author tells you what happened after the main adventure is over. It's like an extra chapter that gives you more information about the characters and what they do next. It's like the frosting on a cake or the cherry on top of an ice cream sundae. It's not necessary to the story, but it gives you a little something extra to enjoy. Basically, an epilogue is the happy ending that comes after the happy ending.