We all have heard about endless benefits that a hair serum offers. Hair serum builds a protective layer over the hair strands. This coating not only acts as a barrier against heat, dirt and other pollutants but protects the hair from damaging factors like dust, styling tools, and humidity. Essentially, the hair serum shields the hair against dryness and dullness and maintains its natural sheen and luster. Often oils make hair greasy and weigh it down, while the application of serum makes hair smooth and manageable without making the hair attract dust. While applying serum it is essential to know its proper application as applying the serum on the scalp is an incorrect way of using it.