Proper spinal alignment:Most people work in seated position all day, destroying our posture. This affects everything including our health, our recovery, our performance and poor posture can change your appearance of your frame. 

Lying on the foam roller repositions the spine to the position it should be in and can assist with correcting forward head posture and kyphosis (too much rounding in your upper back). If you work on a computer, you likely have some of these issues. 
Spinal decompression 

This is important for the person hunched over a computer all day as well as someone who loads his/her spine with a heavy barbell. It decompresses the spine and improves functioning of the nerves that come out of the spinal column. This can improve performance. 

 By identifying the tight muscles and the weaker muscles in your body, you can develop an appropriate stretch and strengthening routine to correct your posture and reduce your risk of injury.