Sri Vidya is one of the popular vidya in Sakta. According to hindu practice, the word Vidya is taken from the word-root “Vid” which means to know, hence Vidyā is learning. Worship of a god is the gradual process of elevating the level of consciousness of the worshipper into that of the God, realizing the God and his nature. Therefore the knowledge and worship of each God is called a Vidyā. Thus ŚrīVidyā is the knowledge and worship of Mother Goddess Śrī Devi. She is also called Śrī Māta (Mother Śrī), Tripura sundari.
“Śrī” means prosperity, auspiciousness, divinity. Śrī Devi is the Divine Mother who bestows bliss and plentitude on Her devotees. In Veda, She is praised as Śrī. Vedic knowledge diversified and developed into different schools like śmarta (following śmritis like Dharma Śāstras), Śrauta (studying śruti or Veda), Paurānika (following śmritis like Purāṇās) and so on. Tantra is another school of practices that combines methods of worship with philosophy and theology. With these developments, Śrī Devi came to be known and worshiped in different forms. In Purāṇās, Śrī is called Laksmi, the Goddess of wealth and prosperity. The worship of Śrī Māta or Tripura sundari, developed as ŚrīVidyā, one of the major cults in Śāktā Tantras. The kaula-practitioners of ŚrīVidyā differentiate it as Śrī Kula Tantra, while ŚrīVidyā Tantra is the general name used by all the ŚrīVidyā practitioners.
Tripura sundari literally means the most beautiful lady of three worlds. Mother Śrī is said to be the most beautiful Goddess among all God-forms. Tripura sundari is worshiped in different names and forms, like Lalita, Bāla, Rāja Rājeswari.