With a 3D printer it is possible to create physical objects based in a three-dimensional model with successive layers of material.
After the object is created in a 3D modeling software, like Blender 3D, the digital three-dimensional object needs to be sliced and transformed into layers in another specific software.
One of the advantages of this tecnology is that we can make rapid prototyping of objects.
Here you can see some of the printed objects that were made with a Creality CR10 3D printer. The software used for slicing was Ultimaker Cura.