Okay kiddo, so let's say someone does a really bad thing and breaks the law in Australia. Depending on how bad the thing they did was, they might get punished with something called "life imprisonment". But what does that mean?
Well, life imprisonment means that person will have to spend the rest of their life in jail or prison. They won't get to live with their family or friends outside of the prison anymore, because they did something really serious that hurt other people. They will have to stay in their cell and follow a lot of rules.
There are different types of life imprisonment in Australia, too. Some might mean that the person can apply for parole (which means they can ask to be let out of prison early if they behave well and show they are sorry for what they did), while others might mean they don't ever get that chance and will be in prison for the rest of their life.
It's important to remember that life imprisonment is a very serious punishment that is only given out for very serious crimes. It's also important to remember that people can change and learn from their mistakes, but sometimes the consequences of their actions mean they have to face a very long time in prison.