Identify the conventions or characteristics that define this genre, and relate those conventions/characteristics to the work that the genre does for the people who use it. The main question your analysis should address is: Why does the genre take the shape(s) that it does given what people are trying to accomplish when they use that genre? If you can get used to doing this kind of analysis when you encounter new genres, you’ll be able to create documents in those genres more quickly and successfully yourself, and become a better reader of those genres when you encounter other instances of them.