What is the significance of Blanche DuBois' monologue in Scene 6 of A Streetcar Named Desire?

Blanche's monologue is a chance for the audience to understand her past and more importantly the impact her past has had on her. It provides an explanation for her actions in other parts of the play and justifies aspects of her character such as her desperation to find a man. The main focus of the monologue is Blanche recalling her experiences of falling in love when she was young. An experience which Tennessee Williams emphasises to make the audience sympathise with her. Most importantly, then, is the loss of that love which was so traumatic for her that it impacted her and her ability to love.