Why are boasting and storytelling so important in medieval warrior culture of Beowulf

The concept of boasting in the world of Beowulf does not carry the carry the negative connotations. Important factors in the society such as Beowulf has the highly priced and indeed quit necessary in a world full of constants feuds and battles. By achievements it would make the warrior to be very strong. The culture views of heroism is mainly depended upon the cause of boasting.