From my understanding it is used to promote lower growth/create many top colas without topping. The pics I've seen you can kind of spread out your tops and keep them level therefore allowing you to get your lights closer. It takes longer than the basic "topping" techniques because they don't like to grow when tied down but then explode in growth when released for a few days. Another one to reserch is supercroping. Slightly damage stems and when they fix themselves they can support more weight and can move more water. Both techniques can produce hermies if stress is to great. Trail and error I guess