Structured text is a type of language that computers use to understand and execute instructions. It's like writing a set of rules for the computer to follow. The rules are written in a very specific way so the computer always knows what to do. Think of it like a recipe for a cake, where you have to follow each step in order to get the cake right.
In structured text, the rules are written in a way that makes it easy to read and understand for people too. For example, to tell the computer to turn on a light switch, you might write "if the light switch is off, turn it on".
Another thing to know is that structured text is used for controlling things like machines and robots. So, it's very important to be very specific with your commands, just like how you'd give specific instructions to someone if you were asking them to do something potentially dangerous, like using a sharp knife.
Overall, think of structured text as a set of really specific instructions that you write for a computer to understand, so that it can control machines and robots safely and correctly.