Domain layer

The domain layer is like a big box of rules for a computer program. This box is where all the important stuff happens, like how the program knows what you want it to do and how it should work.

Imagine you are building a toy robot. The robot is your computer program, and it needs to know what to do when you push its buttons. The domain layer is like the program's instruction manual that tells it what those buttons mean and how it should react.

The domain layer is also a place where you can put all the things that are special or unique about your robot. Maybe your robot has cool features that other robots don't have, like a laser beam or a voice command option. You can put these things in the domain layer so that the robot knows how to use them.

Overall, the domain layer is like the brain of a computer program. It's where all the important decisions get made and all the important things get stored, so that the program can work the way it's supposed to.