Jupiter is the most generous among the planets and brings us help and good luck. He represents all areas of life that are related to growth and learning. All the graces we receive in life are also embodied in Jupiter.
At the same time, it represents law and order, both external and internal. Thanks to his influence, all the good things in life reach us.
The areas of life that are influenced by the Jupiter Yantra are: learning and teaching, priests and brahmins, the hierarchy of law and order, mercy, happiness and luck.
Organs and systems of the body: thighs, buttocks, liver, gallbladder, pancreas.
The Jupiter Yantra enhances the qualities: learning and teaching, spiritual life, hierarchy of law and order, mercy, happiness and luck.
The good position of the Jupiter Yantra increases: truthfulness, stability, concentration, knowledge, happiness, optimism, benevolence, openness, generosity, genius, joy, health, pleasure and harmony in family relationships, strengthens mental strength and gives the ability to comprehend intimate knowledge.
Brihaspati is in Vedic mythology the personification of the planet Jupiter, the Guru (spiritual teacher) of the gods, the lord of sacred wisdom, sacred speech, the supreme priest-mentor of the celestials, the lord of the brahmins, the expert of all mantras, the god of sacred speech and the spoken word, through which knowledge is transmitted, gifted with noble intelligence, one of the 28 Vyas who brought knowledge.
The name Brihaspati consists of two parts: bhas — means 'ritual, rite'; pati— 'lord, lord', therefore one of the meanings of the name is "Lord of rites", "Lord of Rituals", "Lord of prayer".
Jupiter is considered a planet of good luck, well-being and prosperity. Wealth, abundance, and goodness are under his control.
Jupiter is considered the most generous and magnanimous, so in the hymns of the Rig Veda he is revered as bringing many gifts.
As you know, Jupiter is the most beneficial of all the nine Navagraha planets. However, if, according to Jyotish, Jupiter is weak in the birth chart, he can give irresponsibility, avarice, tendencies to condemnation and criticism, rude speech, disrespect for teachers, lack of morality and problems with children. That is, all the qualities opposite to those inherent in Brihaspati. Guru-yantra, or Jupiter yantra, is used in such cases. The ideal time to install yantra in the house is considered to be Jupiter Day — Thursday. As a rule, it is installed in the north-east direction. The Brihaspati Yantra enhances the energies of goodness radiated by Jupiter, that is, all the qualities that he bestows: compassion, striving for spiritual growth, generosity, generosity.

The mantra of the Jupiter Yantra: OM GRAM GRIM GRAUM SAH GURAVE NAMAH