Digital model
A 3D model file tells the computer what shape you want to print.
A simple explanation of how digital designs become real objects.

3D printing is a process that creates real objects from digital files. Instead of cutting material away, a 3D printer adds material one layer at a time until the object is complete.
This is also called additive manufacturing. It is used for toys, tools, models, replacement parts, prototypes, decorations, cosplay items, and professional parts.
A 3D model file tells the computer what shape you want to print.
Slicer software turns the model into printer instructions.
The printer builds the object layer by layer.