The 80/20 Rule, also referred to as the Pareto Principle, Juran’s Principle, the Vital Few and Trivial Many Rule, and the Principle of Factor Sparsity.
This principle, which I’ll refer to in this piece simply as the 80/20 rule, when considered in the context of website and web app design can have a profound effect on the user experience, and ultimately on the effectiveness of the content or functionality of your website or web app. By Louis Lazaris