Help me study for my Management class. I’m stuck and don’t understand.

Vision statements answer the question, “What do we want to become?” or “Where do we want to go?” Here are the vision statements for three companies, drawn from their websites:

Hilton Hotels: “To fill the earth with the light and warmth of hospitality.”

Facebook: “People use Facebook to stay connected with family and friends, to discover what’s going on in the world, and to share and express what matters to them.”

Patagonia: “We prefer the human scale to the corporate, vagabonding to tourism, and the quirky to the toned-down and flattened out.”

Answer: Do these vision statements work? Do they meet Fortune’s criterion of describing “what’s happening in the world you compete in and what you want to do about it. It should guide decisions.”?