Dystopian fiction means books or stories where the world is very different and not very good. It's like pretend there's a place where everything is bad, like no one has enough food to eat, or the government is very mean to people, or the environment is really messed up. These stories are about people who live in these bad places and how they struggle to fix things or make it better. It's important to remember that this is pretend and it's not real, but it's still important because it helps us think about how we can make the real world better.