Why is it good for us as writers to know what is the plot?
First, by knowing the elements of plot, writers will easily find new ideas for new stories. From an idea on an objective, a conflict or an advancement or a twist, it is possible to develop the rest of the story.
Second, we will be able to lead the story easily so that it advances, it is entertaining and does not linger at uninteresting elements. It is possible to do this in two general ways. Writers generally identify with one of them.
On the one hand, there are those writers who elaborate a scheme, a plan of the plot for their story or novel before starting to write. These authors record some, many or all of the objectives, conflicts, advancements, twists and interactions of the characters, etc., in a scheme, a list, a map or a diagram, according to their preferences or habits; and, once it is finished, they use it as a guide to begin writing the narrative a phrase at a time.
On the other hand, there are those writers who write without previous planning. They begin their story from the first sentence, from an interesting situation, and they develop the narrative and the plot simultaneously.