The document discusses what defines a good mission statement, including that it should be short, focus on what and for whom rather than how, be able to guide the organization, be shared and articulated by stakeholders, and be achievable within a reasonable time frame. It notes that a mission describes what you want to change for whom using a verb, target, outcome structure in under 10 words. It provides examples of missions and their corresponding single measurable metrics that can track successful outcomes directly attributable to the organization's strategies.