Expository writing explains a subject or topic. Strong proposals, letters, college essays, non-fiction and historical novels explain a subject, or proposition, in clear, unambiguous terms. Communicating a point of view in the piece of writing -- without creating a biased stance -- helps an audience read the writing as expository, not cajoling. Practicing clear explanations orally helps a writer apply well thought-out and streamline thinking into her work.
If you identify your point of view early on in a paper or proposal, readers understand your writing goal. For instance, if a writer states clearly in a film proposal that the movie she wants to make emotionally touches on three crucial themes affecting society today, the reader will more likely look forward to the themes she outlines and read on: she has the opportunity to persuade. Without a clearly identified personality to the piece, a writer loses his readers.
A basic rule of communication is speaking in clear, audible sentences -- the same goes for writing. An interlocutor that finds you difficult to understand and, thus, respond to, makes communication challenging. Good communication skills in writing, like crafting concise, informative sentences, assures readers that you are serious about relaying information. For example, in a college application essay, if you write incomplete sentences or drift from idea to idea without finishing the thought, your reading audience loses trust in your writing, much like in a conversation with no foreseeable purpose but talking to fill the air.
Writing that communicates personally with an audience ensures readers that they are part of the reading experience. For instance, in an essay, story or novel, include the reader by illustrating, not telling. Letting the reader imagine how a character responds to a situation through dialogue, or a gesture, without telling readers "She was sad" or "He felt happy to be alive." Instead of explaining the emotion or action, note that she averted her eyes or that he sprung from his bed, with a smile fresh on his lips.