The Puranas are a group of Hindu scriptures that are believed to have been composed between 500 BCE and 1000 CE. They are a collection of stories, legends, and myths that are meant to convey spiritual and philosophical teachings. The Puranas are divided into three categories: the Siva Puranas, the Vishnu Puranas, and the Devi Puranas. These texts are considered to be a vital part of Hinduism and are still widely read and revered today.