Bruhad Shanti (ब्रूहद शांति) means “great peace.” In Jain practice, Brihat/Shanti refers to a large, exalted peace prayer or ritual (often called Brihat Shanti Path or Vidhan) that is recited to invite harmony, remove obstacles, and seek auspiciousness for individuals, families, communities, or the world. It is commonly used in ceremonies and important occasions to invoke peace through Jain prayers, devotional actions, and reverence to the Tirthankaras. It is one of the traditional Shanti prayers and is sometimes contrasted with shorter, Laghu Shanti (small peace) rituals used in other contexts. You can read more here