Yantra means a "talisman", or "instrument" or " Amulet" or "Kavach" which, if prepared and created by a qualified person as well as utilized under his specific instructions for fruitful results, will help to gain the objector objects of desire or ambition. Although it would not be a difficult task for most of us to copy the form of a Yantra, it would not have the desired effect. Furthermore, to be perfectly honest, it would be all but useless if not created by a qualified person and then "infused" with the specific energy via the medium of mantra. Otherwise, it becomes just an interesting form or picture to look at, but has no real effect on time or circumstances within life.
A Yantra is essential in every field of your life, to attain success in your profession, to acquire wealth, to win in court cases, to ward off diseases and to progress in meditation. By having a Yantra and keeping it in a sacred place in your house, gazing it everyday can fulfill your desires and help in attaining your goals.
There are different types of Yantras for different purposes. They can help you to attain success in your business, bring the person under your control, and bring wealth and prosperity to you. The Yantras have to be purified and energized before using it. Yantras energized during the nights of Maha Shivratri, Holi and Diwali are most effective and powerful. Normally the related Mantras are also chanted in the presence of the Yantras for quick results.