Sugríva, lord of virtuous mind, The foremost of the Vánar kind, An exile from his royal state, Roams through the land disconsolate. I, Hanumán, of Vánar race, Sent by the king have sought this place, For he, the pious, just, and true, In friendly league would join with you.

In plain words: Hanuman now reveals himself. He says Sugriva, the good king of the vanaras (monkey people), has been driven from his kingdom and wanders sadly. Sugriva has sent Hanuman because he wants to become their friend and ally.