The Pareto principle (also known as the law of the vital few and the principle of factor sparsity) states that, for many events, 80% of the effects come from 20% of the causes.

Eg. Often or not, most people is only wearing 20% of his/her clothes in his/her wardrobe which means 80% of the clothes are wasting the spaces in the wardrobe.

Applying this principle to the internet world, we can actually determine and eliminate redundant costs that are lowering your overall profits.