First they compact the cuticle layer, which will help reflect light, which in turn gives your hair more shine. Thirdly, it make it easier to clean your hair. When the cuticle is compacted, styling products only adhere to the outside portion of the cuticle, so it rinses off easily. Fourthly, it prevents cuticle damage and detangles the hair. Another important tip is to add essential fatty acids to the ends of your hair.
Hair normally receives natural oil from the scalp and neck.
It is called sebum. Once the hair shaft doesn't make contact with the scalp it no longer receives the sebum. Dry hair is a lack of moisture not fatty acids. To replace lost essential fatty acids is very easy to do. Take a drop or two, rub it into your hands, and work it in to the ENDS of your hair.