'Aigiri Nandini Nanditha Medhini' is a very popular Durga Devi Stotram. Mahishasur Mardini is an incarnation of Goddess Durga which was created to kill the demon Mahishasur. 'Aigiri Nandini' is addressed to Goddess Mahishasur Mardini. Mahishasura Mardini Stotram is a very popular devotional stotra of Goddess Durga written by Guru Adi Sankaracharya (Sri Sri Sri Shankara Bhagavatpadacharya). This devotional verse is addressed to Goddess Mahisasura Mardini, the Goddess who killed Demon Mahishasura