Beowulf is an Old English epic poem that follows the hero Beowulf and his battles against the monster Grendel and later a dragon. It explores themes of heroism, loyalty, kingship, and fate. The poem celebrates the deeds of Beowulf, a Geatish warrior who helps the Danish king Hrothgar defeat Grendel and later fights a dragon to protect his own kingdom. Beowulf exemplifies the heroic code of his society through his courageous acts and receives high praise.