It's an uneven distribution that can be found in countless life and business situations. Practical examples of the Pareto principle would be: 80 % of your sales come from 20 % of your clients. 80% of your profits comes from 20 % of your products or services. 80 % of decisions in a meeting are made in 20 % of the time.
80% of crimes are committed by 20% of criminals. 80% of sales are from 20% of clients. 80% of project value is achieved with the first 20% of effort. 80% of your knowledge is used 20% of the time.