Durga is an incarnation of Goddess Parvati, and she took this form to destroy the demon Mahishasura. She is the protective mother of the universe, and also known as Devi and Shakti. Goddess Durga symbolizes the divine forces (positive energy), and protects mankind from evil forces(negative energy). Goddess Durga is worshipped during Navaratiri, a festival celebrated for nine days worshipping the Goddess in nine different forms collectively known as Nava Durga.