Shanmata is the system of worship

Bhakti

In Hinduism Bhakti is religious devotion in the form of active involvement of a devotee in worship of the divine.Within monotheistic Hinduism, it is the love felt by the worshipper towards the personal God, a concept expressed in Hindu theology as Svayam Bhagavan.Bhakti can be used of either...

, believed by the Smarta tradition to have been founded by Adi Shankara

Adi Shankara

Adi Shankara Adi Shankara Adi Shankara (IAST: pronounced , (Sanskrit: , ) (788 CE - 820 CE), also known as ' and ' was an Indian philosopher from Kalady of present day Kerala who consolidated the doctrine of advaita vedānta...

, the 8th century CE

Common Era

Common Era ,abbreviated as CE, is an alternative designation for the calendar era originally introduced by Dionysius Exiguus in the 6th century, traditionally identified with Anno Domini .Dates before the year 1 CE are indicated by the usage of BCE, short for Before the Common Era Common Era...

 Hindu philosopher

Hindu philosophy

Hindu philosophy is divided into six schools of thought, or , which accept the Vedas as supreme revealed scriptures. Three other schools do not accept the Vedas as authoritative...

 . It centers around the worship of the six main deities

Deva (Hinduism)

' is the Sanskrit word for god or deity, its related feminine term is devi. In modern Hinduism, it can be loosely interpreted as any benevolent supernatural beings. The devs in Hinduism, also called Suras, are often juxtaposed to the Asuras, their half brothers. Devs are also the maintainers of...

 of Hinduism

Hinduism

Hinduism is the predominant and indigenous religious tradition of the Indian Subcontinent. Hinduism is known to its followers as , amongst many other expressions...

, viz, Shiva

Shiva

Shiva is a major Hindu deity, and is the destroyer god or transformer among the Trimurti, the Hindu Trinity of the primary aspects of the divine. God Shiva is a yogi who has notice of everything that happens in the world and is the main aspect of life. Yet one with great power lives a life of a...

, Vishnu

Vishnu

Vishnu is the Supreme god in the Vaishnavite tradition of Hinduism. Smarta followers of Adi Shankara, among others, venerate Vishnu as one of the five primary forms of God....

, Shakti

Shakti

Shakti from Sanskrit shak - "to be able," meaning sacred force or empowerment, is the primordial cosmic energy and represents the dynamic forces that are thought to move through the entire universe in Hinduism. Shakti is the concept, or personification, of divine feminine creative power, sometimes...

, Ganesha

Ganesha

Ganesha , also spelled Ganesa or Ganesh, also known as Ganapati , Vinayaka , and Pillaiyar , is one of the deities best-known and most widely worshipped in the Hindu pantheon. His image is found throughout India and Nepal. Hindu sects worship him regardless of affiliations...

, Surya

Surya

Surya Suraya or Phra Athit is the chief solar deity in Hinduism, one of the Adityas, son of Kasyapa and one of his wives, Aditi; of Indra; or of Dyaus Pitar . The term Surya also refers to the Sun, in general. Surya has hair and arms of gold...

 and Skanda

Murugan

Murugan also called Kartikeya, Skanda and Subrahmanya, is a popular Hindu deity especially among Tamil Hindus, worshipped primarily in areas with Tamil influences, especially South India, Singapore, Sri Lanka, Malaysia, Mauritius and Reunion Island. His six most important shrines in India are the...

. In this system, six major deities are worshipped. This is based on the belief in the essential oneness of all deities, the unity of Godhead, and their conceptualization of the myriad deities of India as various manifestations of the one divine power, Brahman

Brahman

In Hinduism, Brahman is the one supreme, universal Spirit that is the origin and support of the phenomenal universe. Brahman is sometimes referred to as the Absolute or Godhead which is the Divine Ground of all being...

.

Philosophically, all are seen by Smartas as equal reflections of the one Saguna Brahman

Saguna brahman

Saguna Brahman came from the Sanskrit "with qualities" and Brahman "The Absolute".-Advaita:...

, i.e., a personal God with form, rather than as distinct beings.

Smartas accept and worship the six manifestations of God, (Ganesha, Shiva, Shakti, Vishnu, Surya and Skanda) and the choice of the nature of God is up to the individual worshipper since different manifestations of God are held to be equivalent.
It is believed that in Adi Shankara's time these deities had their own Hindu

Hindu

Hindu refers to an identity associated with the philosophical, religious and cultural systems that are indigenous to the Indian subcontinent. As used in the Constitution of India, the word "Hindu" is also attributed to all persons professing any Indian religion...

 followers who quarrelled with each other claiming the superiority of their chosen deity

Ishtadevata

Ishtadevata may mean:*Iṣṭa-deva: In Hinduism, an Ishta-deva or Ishta devata or Ishta-devatha is a term meaning "the God to which one prays most."...

. Adi Shankara is said to have synthesised these quarrelling sects by integrating the worship of all these deities in the Shanmata system.