Can I keep a Śrī Yantra at home, and how is it worshipped?
yes, many homes keep one as a form of the Divine Mother; simple, regular worship with respect is the common practice.
The Śrī Yantra (Śrī Cakra) is a sacred geometric diagram of nine interlocking triangles around a central point (bindu), seen in Śrīvidyā as the form of Lalitā Tripurasundarī and, more widely, as an emblem of Lakṣmī and auspiciousness. Ādi Śaṅkarācārya is traditionally associated with installing Śrī Cakras at several temples.
In homes it is usually kept in the mandir on a clean cloth or plate, facing the worshipper. Simple worship includes offering kumkum and flowers, a lamp and incense, and reciting the Lalitā Sahasranāma, the Śrī Sūkta or a Lakṣmī stotra, especially on Fridays. Some wash a metal yantra with water or milk on special days.
Detailed Śrī Cakra pūjā (navāvaraṇa) is part of Śrīvidyā and is learned from a teacher. For a household, keeping it clean and offering simple daily devotion is enough. Be wary of yantras sold with promises of guaranteed wealth.
Nine interlocking triangles around a bindu · Source: Śrīvidyā tradition
Dharma Q&A — worship at home · Ask a Jyotishi your own question