A Welsh school that teaches about security studies is a special place where grown-ups go to learn about how to keep people safe. Think of it like a big school that teaches special classes about how to protect important things like buildings, computers, and even people.
In this school, you might learn about things like locks, alarms, and cameras, which are used to keep bad guys from doing bad things. You might also learn about how to make sure that important information stays secret so that no one can use it to hurt someone else.
Security studies can be really tricky and there are lots of different things to learn about, but it's all important because it helps keep people safe. Just like how you learn how to stay safe by looking both ways before crossing the street or not taking candy from strangers, grown-ups learn how to keep everyone safe too.