You have to give us some more information...
The main idea is to let both sides of the argument make up and live to the law or god(im not too sure)
Anglo-Saxons liked to gather in the lord's great hall, to eat and drink, and to listen to songs and stories. They loved tales about brave warriors and their adventures. A favourite story told how Beowulf, a heroic prince, kills the fierce man-eating monster Grendel, and Grendel's equally horrid mother. The story of Beowulf was first written down in the 8th-9th centuries, but long before that the story was told around the fire. The storyteller played music to accompany the songs and poems, on a small harp or on another stringed instrument called a lyre
Answer:
It prepares readers to look for new vocabulary as they read.
Explanation:
Including a vocabulary section at the beginning of a text is a useful tool for the readers to identify the key words of the topic and understand them properly before start analyzing the text. If the readers are already aware of the exact meaning of these key works, their analysis will be much more accurate and comprehensive.