What is spinal manipulation for back pain?

What is spinal manipulation for back pain?
Also known as spinal manipulative therapy (SMT), it is a combination of moving a joint, massage, exercise, and different physical therapies. The objectives is to restore proper function, proper range of motion, reduce pressure on joints, reduce inflammation, improve nerve function. It can be used to treat pain in the following areas: back, neck, shoulder, knee, hip, ankle, and lower back.

Q: Is spinal manipulation safe for back pain?  
A: Yes, spinal manipulation for back pain is safe provided that it is performed by a licensed chiropractor following a pre-screening and an evaluation.