3d printing is an additive manufacturing method that makes layer on layer by adding raw material to make a 3d object.
In above video you can see FDM 3d printing in action
It is good for rapid prototyping
The most popular 3d printing types are FDM and SLA
3d printing is a very versatile process and can make designs that are very difficult to make.
Now 3d printers are available for everyone.
With this technology you can convert your design into reality within a few hours.