The primary mission of LRO is to conduct investigations in preparation for future exploration of the Moon. More specifically, LRO will spend 12 months looking for suitable landing sites and try to locate potential resources, such as water ice. In doing so, it will return thousands of detailed images and rich scientific data, that will help us to better understand the Moon's topography (i.e. how it's surface changes) and composition. It has been said that LRO is leading NASA's way back to the Moon.
If you would like to find out more about the LRO mission, then click HERE