A dystopian world can be described as a world full of unpleasantness and misery. In an essence, it is the exact opposite of a utopian world. In a dystopian world, everything is quite dehumanising and people are usually oppressed by powerful leaders. For example- In a dystopian world, ordinary citizens may be forced to restrict their movements, stay away from popular media and have very limited freedom of speech.
Writers make frequent use of the idea of a “dystopian world” to inform people about what could happen to society in the future and how some places have already exhibited or have started exhibiting the specific qualities of such a world, something which must be acted against. They might also be making use of such an idea to educate people about what could happen if they vote for politicians who have dictator like tendencies.
In terms of what I have read that can be categorised as dystopian fiction, there is not a lot to mention. Fahrenheit 451 was most likely the first piece of writing which utilised the idea of a dystopian world, that I have read. I had enjoyed reading Fahrenheit 451 and I think that I will continue reading books of similar nature in the future.