In India, it's tradition for women to wear a bindi. A bindi is a mark, generally circular, made on the center of the forhead.
The dot is commonly placed slightly above the junction of the eye brows as this area represents the seat of concealed wisdom. Wearing a bindi on that area is said to strengthen concentration and retain energy. Also, this area is considered to be the seat of the third eye. The third eye as per Indian spiritual texts is the inner or invisible eye which can give you perception beyond ordinary sight. It is thought to be the gate to higher consciousness. Therefore people who meditate generally fix their gaze at this spot.
Generally the mark is made in red as it represents the colour of love, honour and prosperity.
In ancient times, the bindi represented a sign of worshipping ones own intellect therefore it was worn by both men and women.
A strong intellect was thought to help one to make noble decisions in life, to be able to stand up to challenges in life with courage, and to recognise and welcome good thoughts in life.
In some parts of india a red dot on the forehead is made to signify the married status of the woman and is a sign of respect for the institution of marriage.
Over the years , the bindi might have lost its religious importance but it is worn very frequently with the Indian traditional dresses such as the Sari to cosmetically enhance the look.