OK, so the United Kingdom has a special way of giving people awards for doing really good things. These awards are called Honours and there are different types of them. For example, some are called a Knighthood or a Damehood, which means the person can be called Sir or Dame before their name.
Now, when a person gets more than one Honour, they might wonder which one to wear first. The people who make the Honours have a special list called an Order of Precedence. This list tells them what order the Honours should be worn in.
The Order of Precedence is like a ladder. The highest Honours are at the top rung of the ladder and the lowest Honours are at the bottom. So, if a person has more than one Honour, they wear the one that is higher on the ladder first.
For example, if someone has a Knighthood and a CBE (which is another type of Honour), they would wear the Knighthood first because it is higher up on the ladder than the CBE.
It's important to remember that this Order of Precedence only applies in the United Kingdom. Other countries might have their own set of rules for wearing Honours. But in the UK, the order is very important and helps everyone know how important the person wearing the Honours is.