Purpose of Soliloquy in Modern Drama

In the context of modern drama, the soliloquy often serves to bridge the audience's understanding of a character's motivations and challenges. A notable example can be found in Death of a Salesman by Arthur Miller. In this play, a soliloquy is delivered by the character Willy Loman, who reflects on his dreams and disillusionments. Considering the significance of such moments, which option best describes the primary purpose of a soliloquy in this context?