God Prayer (Aarti) is said to have descended from the Vedic concept of fire rituals, or homa. The word may also refer to the traditional Hindu devotional song that is sung during the ritual. Aarti is performed and sung to develop the highest love for God. "Aa" means "towards or to", and "rati" means "right or virtue" in Sanskrit.
God Prayer ( Aarti) is generally performed Two to Five times daily, and usually at the end of a puja or bhajan session. It is performed during almost all Hindu ceremonies and occasions. It involves the circulating of an 'Aarti plate' around a person or deity and is generally accompanied by the singing of songs in praise of that deva or person (many versions exist). In doing so, the plate itself is supposed to acquire the power of the deity. The priest circulates the plate to all those present. They cup their down-turned hands over the flame and then raise their palms to their forehead - the purificatory blessing, passed from the deva's image to the flame, has now been passed to the devotee.
(Indian God Prayer)