A model is a representation of reality, but not reality itself. In a model, complex relationships are simplified and reduced to their essential aspects. This allows aspects of reality to be grasped and understood more clearly than in the actual reality.

Models are an important tool for understanding complex relationships. With a model, for example, calculations and predictions can be made, hypotheses can be tested, and insights can be gained.

In this sense, it is intentional for a model to simplify and abstract reality without distorting it. It is also important to note that the more complete and realistic a model is, the less understandable and useful it may potentially be.