Desktop 3D printers generally save time and material by making the interior region of the printed object not completely solid. The inside region of the 3d printed object is called as “Infill” and can be made with lots of different patterns, though hexagonal is shown below and rectilinear grid are most common. A higher density infill can contribute to the strength of an object.

Different infill percentage

Importance of Infill during 3D printing:

While you are aware that infill has a impact over 3D printed parts, now it is clearly on your side on what you want so let us see the matrix below and check on 

which part of the matrix you exist and accordingly you go for the infill