Modeling is some important because it can give you dimension and prototyping without having to actually build a physical prototype! When modeling on platforms such as AutoCAD or Solidworks, a physical structure can be modeled and built without the need for physical materials which will save time and money. Modeling brings physical creations to life through a computer. This is applicable in all forms of engineering to build anything from a building and bridge to a company's internal network. This lays the literal and metaphorical foundation for the design of anything that is being built.
Examples of Models: