How can you find directions using satellite orbiting?

Satellites may move north to south, or south to north, or west to east, but never from east to west. When satellites are launched, they always head eastward to take advantage of the Earth's rotation, going more than 1,000 miles per hour near the equator. This saves a lot of fuel.

okay i have so many questions. but the big one here is: um wt..f is this mess? ?