Okay kiddo, do you know what the Pope is? He is like the big boss of the Catholic Church, and the Roman Curia is like his team of helpers. It's like when you play soccer, and there's a coach and some assistant coaches who help him make decisions and organize the team.
So, a long time ago, Pope Paul VI realized that the Roman Curia needed some changes to make it work better. It was like a big machine with lots of parts, but some of these parts were not working well together. So, he decided to do a reform, kind of like when you clean your room and organize everything in a better way.
The first thing he did was to change the way the Curia was organized. He created new departments that would focus on specific things, like the one that deals with helping the poor and needy, or the one that deals with promoting understanding between different religions. This way, each department could focus on what it was good at, and not try to do everything at once.
Another thing he changed was the way people were appointed to work in the Curia. Before, it was mostly based on who you knew, but he wanted to make it fairer, so he made a system of exams and evaluations to choose the best people for each job. This way, everyone would get a chance to work there, no matter what their background was.
Finally, Pope Paul VI wanted to make the Curia more transparent and accountable. This means that he wanted people to know what was going on inside the Vatican, and to be able to ask questions and get answers. He created a new office called the Prefecture for Economic Affairs, which would be in charge of managing the money and making sure everything was done honestly and ethically.
So, in summary, Pope Paul VI made some changes to the Roman Curia to make it work better. He created new departments, made a fairer system of appointment, and made the Vatican more transparent and accountable. Just like when you clean your room, he wanted to make sure everything was in the right place and worked together nicely.