Your search engine ranking can be increased if you ask a question and then respond to it in your article. By doing this, you are asking the question for Google, as a person would, then you are giving a response to that question. A search engine will pick this information up and then it will be able to see that you are asking and answering the question for the topic it is covering. It will cross reference the information you have put with the information other people have covered the topic with and will reward you for giving a good answer.