Strategy is the combined set of potential business models an organization can implement in response to changes in its environment. It includes models that are not currently in use but could be if needed. An organization's vision provides long-term goals, its mission outlines its purpose and responsibilities, and its business model is how it creates value through its current operations. Blizzard Entertainment's mission is to create epic entertainment experiences. Its realized strategy involves providing a reliable virtual world through World of Warcraft to attract and retain paying players through monthly fees and expansions. Its potential strategies include exploring microtransactions. Blizzard's stated strategy is to be the most appreciated and trustworthy entertainment provider by 2015 through high quality experiences.