After a reader finishes a book or a short story, it’s often the ending that resonates most strongly. In some ways, the whole book is about its ending: Everything leads up to the ending, and once it’s over, everything points back to it.
But great endings are hard to do well. They require a writer to have a lot of control over the narrative tension and pacing. They often gather many plot elements together into a singular compelling moment to create a high-tension climax. No easy task!