Do You Know Why multicoloured Dots are used in NEWSPAPER ?

Why do newspapers print a combination of four dots ??

The four dots CMYK (Cyan, Magenta, Yellow and Black) are called registration marks. They are used during printing to help ensure the print is aligned properly.

In Detail 

In offset printing technology, which newspapers use, the inked image is transferred from a plate to a rubber blanket, then to the printing surface.

These primary colours go into printing a multicoloured image and have separate plates. Each plate has it's individual mark, like the colour dot.