Every story eventually comes to a conclusion, it’s the writer’s job to make sure that conclusion satisfies both the needs of the story and the desires of the reader. The story needs a conclusion that ties up all of the loose plot threads and ensures that every character has been through a complete arc. These technical details are important to the reader, but only at the basic level. The reader knows they are important to the story, but he is much less interested in the fact that the conclusion to every plot point and character arc exists than in how that point is concluded. The reader doesn’t just want a conclusion to the story; the reader wants a satisfying payoff.