Ketu is the Lord of Descending. He is considered as Tail of the Demon Snake. It is believed to have a tremendous impact on human lives and also the whole creation. In some special circumstances it helps someone achieve the zenith of fame. He is Tamas in nature and represents supernatural influences.

In Hindu astrology Ketu represents karmic collections both good and bad, spirituality and supernatural influences. Ketu is associated with the Meena Avatar (Fish Incarnation) of Vishnu. Ketu signifies the spiritual process of the refinement of materialization to spirit and is considered both malefic and benefic, as it causes sorrow and loss, and yet at the same time turns the individual to God. In other words, it causes material loss in order to force a more spiritual outlook in the person. Ketu is a karaka or indicator of intelligence, wisdom, non-attachment, fantasy, penetrating insight, derangement, and psychic abilities. Ketu is believed to bring prosperity to the devotee's family, removes the effects of snakebite and illness arising out of poisons. He grants good health, wealth and cattle to his devotees. Ketu is the lord of three nakshatras or lunar mansions: Ashvini, Magha and Mula.

Ketu is considered responsible for moksha, sannyasa, self-realization, gnana, a wavering nature, restlessness, the endocrine system and slender physique.

The people who come under the influence of Ketu can achieve great heights, most of them spiritual.

In his wife Simhikā, Vipracitti begot one hundred and one sons, of whom the eldest is Rāhu and the others are the one hundred Ketus.