Censorship is like when someone decides what you are allowed to see or read. In the Republic of Ireland, there are some rules that say some books, movies, or pictures are not allowed to be shown to people because they might be too rude, scary, or bad for you.
There is a group of people called the Irish Film Classification Office (IFCO) who look at movies and decide if they are okay for different ages. If they think a movie is only okay for grown-ups because it has bad words or scary scenes, then they say it is rated "18" and kids under 18 are not allowed to watch it.
There are also some books or magazines that are not allowed to be sold in Ireland because the government thinks they are not good for people to see. This is called "banning." Sometimes it happens because the book or magazine has naughty pictures, or maybe it shows people doing things that the government doesn't want you to do.
Censorship is a way to protect people, but it can also keep people from seeing things they might like. So, it's important to make sure that the people who decide what is okay to show or read are doing a good job and not just stopping everyone from seeing things they should be allowed to.