Maxim is like having your own special set of rules to help you make good choices. Just like superheroes have rules to guide their actions, a maxim helps you act in the right way.
Think of it like a recipe for baking cookies. If you always follow the same recipe, you know you'll get tasty cookies every time. In the same way, a maxim helps you do the right thing, no matter what situation you find yourself in.
People have been using maxims for a very long time. Even famous philosophers like Immanuel Kant had their own set of maxim to live by.
So, when you hear someone talking about a maxim, just remember that it's like a superhero's rules or a recipe for doing the right thing.