Why do we use shading in technological drawings?

Shading in technological drawings is used to give a sense of depth and dimension to the object being depicted. By adding shading, the drawing can more accurately represent the three-dimensional form of the object, making it easier for the viewer to understand its shape and structure. Shading can also help to differentiate between different surfaces and materials, highlighting important features and details. Additionally, shading can be used to create a sense of realism and make the drawing appear more lifelike.