How does alliteration affect the epic poem Beowulf?

Given that Beowulf is an epic poem, it was orally communicated to the listeners, and alliteration is one of those stylistic elements that have a profound impact on the sound experience. It means repeating of the initial consonants in adjacent words, such as in "The glorious gift God had allowed him" (the sound g repeats, to dynamize and vivify the experience).