The document provides guidance on describing, assessing, and improving a business model. It explains that understanding and innovating one's business model is crucial for competing effectively today. The document then outlines a three step process: 1) Describe the current business model using nine building blocks including customer segments, value propositions, channels, and costs, 2) Assess the strengths, weaknesses, opportunities and threats of the current model, and 3) Improve and innovate the business model based on the assessment. Each of the nine building blocks is then explained in more detail to help with the description step.