The denouement is everything that follows after the climax, with one purpose: to wrap up the story. Readers now crave two things. First, a final reactionary scene to show the consequences of the plot and the fate of the characters. Second, answers to all remaining story-questions.
At this point, the reader has felt and seen the forces gather against the protagonist. Absolute disaster is just around the corner. The way you set up the story up to this point, determines the expectation readers have about how it will end. For them, it’s more than an expectation, it’s a silent promise you made. A noisy action packed story promised a big bang at the end. A subtle story promised a quiet ending.