80-20 rule, also known as Pareto Principle, is a well-known rule in business that states that 80% of your company’s revenue will come from just 20% of your customer base. In terms of sales prospecting, only 20% of all your leads will lead to sales.  This is why it is important to find your ideal customer, and custom tailor your approach to target only them. It will help you put those 20% into focus, and save you time chasing the remaining 80% that will bring you no revenue.