Jurisdiction is like a grown-up game of tag. When you play tag, there are certain rules about where you can and can't go. For example, you might say, "The trees are safe," which means that whoever is "it" can't tag you when you're standing near a tree.
In the same way, jurisdiction is all about rules about where different people and organizations have power to do things.
Some places have rules about who can make laws or decide court cases, and those rules are called "jurisdiction." It's like a map that says, "This area is for this person or group only."
For example, a city mayor might have jurisdiction over the city they govern, which means they are in charge of making decisions and laws within the city limits, but they can't make rules or decisions for other nearby cities.
The same goes for courts. Different courts have different jurisdictions. A small claims court may only have the power to decide on cases where the damages are less than a certain amount, while a federal court has jurisdiction over certain types of cases that involve federal laws.
So, just like in a game of tag, different people and organizations have their own set of rules and boundaries for where they can and can't act, and those rules are called jurisdiction.