Good hair grooming is an important part of ensuring the health and longevity of hair. While there are many ways to take care of your hair, conditioning after shampooing is one of the most effective ways to achieve this.
Human hair is covered by scale like cells called cuticles. These cuticles are the outermost covering of the hair, which protect it from all kinds of wear and tear. Once the cuticle is damaged, the hair itself is more prone to damage.
(Pic courtesy – http://www.cfyh.co.uk/2012/03/10/black-hair-scalp-event/)
Damage to these cuticles makes ones hair look dull and rough. Conditioners smoothen the hair scales as opposed to shampoos – whose main purpose is to cleanse the hair shaft and hair follicle. The application of shampoos lead to the opening up of the cuticles while conditioners smoothen them up. Smoothening of the cuticles makes your hair look shiny and lustrous.
One of the main advantages to smoother hair strands is less static and fewer split ends. This makes it easier to maintain the hair. Also smoother cuticles will lead to lesser damage to it while combing your hair.
The ideal frequency to condition your hair depends on the type of your hair. If you have dry hair, then conditioning 2-3 times a week will be effective, whereas if your hair is naturally oily/greasy, then once a week should suffice.
(Disclaimer: Parameters stated above are meant to be indicative and not specific. Kindly consult a trichologist / dermatologist to get an expert opinion.)