What is "The Golden Ratio Rule"? Is there any suggestion to make the effective design composition?

The golden ratio is a sum of art math.. let's make it more simple, it tells you where to put eye catching positions in your design. you should devide your design sketch by3/2 ratio you will get this, here is a better article tells you more http://www.creativebloq.com/design/designers-guide-golden-ratio-