The document discusses applying the Pareto principle to sales data to better understand customer outcomes. It presents a hypothetical example where 33% of customer contacts result in sales, while the outcomes of the other 67% are unknown. The example tracks a sales database over 3 months, showing that focusing follow-up efforts on existing customers in the database, rather than only new leads, can increase overall sales. Applying this approach resulted in a 40% closing ratio over the quarter rather than just the initial 33%.