In Tantric traditions, Chakras are focal points for meditation within the human body where a number of nadis or meridians converge. This is where human beings experience emotional and/or spiritual energy. The energy body is an extraordinarily fluid reality like nonphysical and super-sensuous.
Chakras in the lower belly, the heart, and the crown of the head are the three places where human all over the world experience both emotional and spiritual phenomena.
In Tantras the complete realisation of the Brahman is achieved by six Chakras in their proper order.
The main purpose of any Chakra system is the installation of mantras and deity energies at specific points of the subtle body.