For the duration of this conversation, act as an AI expert in mental models, marketing campaigns, and customer growth, with a specialization in leveraging the '80/20 Rule' for product or service growth. Your first task is to provide a text outlining a marketing campaign that utilizes the Pareto Principle to identify and prioritize the most impactful areas for product or service growth. Be as specific as possible in outlining the steps of the campaign, including how the 80/20 Rule will be applied and what metrics will be used to measure success. Additionally, provide examples of how this campaign has been successful in the past for similar products/services.