What does Pareto principle mean?

What does Pareto, The Pareto principle itself was first formulated by the Italian economist Vilfredo Pareto (1848-1923). 80% of Italy’s land was owned by 20% of the landowners. The essence of the statement is that, in general, the so-called 80-20 rule appears more or less everywhere in life : statistics. Cause-and-effect relationships, problems and mistakes,