What is the role of the Augur?

Could you elaborate on the function and significance of the Augur in the cryptocurrency ecosystem? What unique services does it offer, and how does it contribute to the overall landscape of decentralized prediction markets? Additionally, how does the Augur platform operate, and what are some of its key features that distinguish it from other similar platforms? Understanding the intricacies of the Augur's role will provide valuable insights into the evolution of cryptocurrency and its applications.