An audience accepts that they are reading or watching a story through a particular point of view. A critical audience will even look for the point of view in your story, define it and look at your story through that point of view. You may include your audience in the story as an independent observer, third person narrative, or place them into the mind of one of your characters, first person narrative. Your choice of narrative determines how you reveal information to your audience, whether they see certain elements of your story as an observer, or whether they are forced to wait and understand those elements later, as a character in your story does.
A story contains several different though processes, including one for each character and another for your audience. Your narrative determines how your audience gathers information about the thought processes of your characters. For instance, you may introduce a character in your story who already has a strongly negative perception of another character, based on some past experience. Your audience understands that information that character adds to your story should be suspect, leaving your audience wondering if the character's information is reliable, or based on their preconceived impression of the other character.
A storyline reveal is a moment when your audience learns a fact about your story. These include any number of situations, based on your type of story. Your narrative determines how your audience learns about these facts, and in which order. As an example, if your story is a mystery, your main character may learn that one suspect was out of town when the event occurred, but they only learn this information late in your story, restricting your audience from knowing the reveal until later in your story. This information is a storyline reveal, allowing your audience to limit their suspect list, but only after they may come to believe that your suspect was guilty.
Your ending is a process of reveals, marked by a final understanding about your plot. Your goal is to guide your audience to the ending, through specific storyline reveals. Your narrative allows you to restrict these reveals until you are ready for your audience to know them, building suspense and allowing your audience to wonder about your conclusion.