Why were heroic epics in the vernacular popular with medieval europeans?

People could relate to the stories about the epic heroes and understand them.

Explanation:

Heroic epics are the tales of the 'supposedly' heroic people in ancient times. Their stories and success, along with their extraordinary deeds almost equaling that of the divine beings, are what authors and writers find best to write of.

Medieval Europeans were more into the themes of unity, bravery and a fighting, warlike spirit. These themes found more often in epics were easily also mostly common with the way the people of medieval Europe lived. They value the strong will, unity, fighting spirit and also the feeling of brotherhood, strong themes presented in the epics too. They could relate to all these themes, tales of bravery in wars, unity, strength showed by the warriors, and could be used as an encouraging element. As the people could relate to the tales of the epics, they could understand them and easily feel more connection to the deeds of the heroic characters.