Yajnas are ancient Vedic rituals performed in Hinduism, primarily involving offerings made to deities through fire. These ceremonies are conducted by priests and often include chanting of sacred texts, known as Vedas, to invoke divine blessings. The offerings can consist of grains, ghee, and other items, symbolizing gratitude and devotion. The purpose of Yajnas is to promote harmony, prosperity, and spiritual growth. They are believed to purify the environment and strengthen the connection between humans and the divine. Yajnas can vary in scale, from small household rituals to large community events, each serving to foster a sense of unity and purpose.