The requiem scene in Arthur Miller's play Death of a Salesman plays an important role for the closure of both the play and the life of Willy Loman.
During this part of the play, we come to find out that Willy's perception of his life was wrong all along, from the moment that he chose to become a salesman. We must not forget that, during one of his visions, he told his brother Ben that his funeral will have people coming from all over, and that his sons will be proud of him for that.
However, Willy was only re-creating what happened during the funeral of Dave Singleman, the man that inspired him to become a salesman.
We know that in the requiem scene, nobody shows up at Willy's funeral. Even his wife, Lydia, wonders what is going on,why no one is there. It is quite a horrid moment when death makes you realize the reality of life. Even his sons begin to make their plans for their own future as a result of their father's death. Therefore, not only does this scene helps us realize that Biff was right when he said that Willy followed the wrong dream all along, it also helps us understand the depth of Willy's self-deception.