A customer strategy plan is a document that outlines the company's goals, objectives and strategies for the future. It includes details about customer needs, customers' buying habits and customer preferences. This document should be created with input from all stakeholders in the company. It should also be updated regularly to reflect changes in the market and to ensure that it is still relevant. The document includes sections on customer segments, market analysis, competitors and suppliers, product development, marketing and sales plans, and a section for developing an action plan.