It's one of those pay $5000 to learn a Trademarked technique that has protocols for different areas and conditions. Chiropractors like me use the basic theory, which is to squeeze the shit out of a muscles and stretch it with the patient's active voluntary muscle contraction. Maybe the folks that went to all the seminars do a better job? Maybe folks like me who are skeptical of all things trademarked are better?
Either way it's a great way to work out tight and tender muscles or trigger points. The newest TM on the block is called Graston Technique. I love it, but didn't pay $3000 for the tools or seminars (I made my own tools). This is basically scraping the shit out of muscle, tendon, whatever, in the direction of the fibers. Works really really well.