Who is roac and why is he important to the dwarves in the Hobbit book?

Roac is a raven and the messenger of the dwarf king, Dain Ironfoot, in J.R.R. Tolkien's "The Hobbit." He plays a crucial role by delivering important news to Thorin Oakenshield and the dwarves regarding the growing threat of the elves and men after the treasure hoard in the Lonely Mountain is revealed. Roac's counsel and information help the dwarves navigate the political tensions surrounding their newfound wealth, emphasizing the importance of alliances and communication in their quest. His presence highlights the interconnectedness of different races in Middle-earth.