The document discusses narrowing a research topic from a broad general subject to a specific question. It provides an example of how the author originally chose to write their thesis on all eight of Charles Perrault's fairytales, which was too broad. They would have been better choosing a single tale like "Bluebeard" and asking a focused question about its origins or purpose. Narrowing the topic allows for an in-depth analysis and argument in a paper rather than superficial coverage of multiple works.