it means stimulating the hair follicles for growth they make me kinds of shampoos and conditioners for your hair to grow if you're losing hair thinning hair like I am some kind of an expert on this. you want to drink a lot of water that helps make your hair grow which I don't do. scalp stimulation for hair growth through improve blood circulation. also massaging your hair can also help improve hair growth tiny blood vessels help Supply nutrients maybe this is too much of a description but I hope this helps