Imagine you have a big box full of toys. Some of them are cars, some are dolls, and some are building blocks. It's hard to find what you want to play with when everything is mixed together in the box.
Organizing means putting things into groups so you can find them easily. For example, you might group all the cars together, all the dolls together, and all the building blocks together. This way, when you want to play with a car, you know exactly where to look.
In the same way, when people talk about organizing a model, they mean putting different parts of the model into different groups. This helps them to understand the model better and to know where to look for certain information. It's like creating a toy box that has compartments for each different kind of toy.
For example, if you were organizing a model of the solar system, you might group all the planets together, all the moons together, and all the asteroids together. This would help you to understand how the different parts of the solar system relate to each other.