Mercury is a benefic planet according to Vedic Astrology. Propitiating Mercury through yagya increases the positive effects of Mercury. Mercury rules over those with a Virgo (Kanya) and Gemini (Mithun) rising sign.
Mercury is the planet of the mind, intellect, communication, business, research and education. A balanced Mercury gives good intelligence, discrimination and strength in the above mentioned areas of influence. Unbalanced Mercury can lead to mental disease, nervous disorders, dental problems.