A company's mission is what gives meaning to its work and makes its employees more purposeful. Basically, the mission answers the question: "What, how and for whom does the company do?" and explains in an intelligible form what the organization exists.
Corporate values reflect the guiding principles of the company. Further, the extent to which the organization follows the stated beliefs determines the level of trust in it on the part of clients and employees.
In the mission, you informed me about where your company is now. Where you want to be tomorrow conveys your vision - it shapes the future image of your business.