1. Genre: Knowing the genre lets you adhere to its conventions and structure.
2. Audience: Understanding your audience helps tailor your language, tone, and content to their needs or interests.
3. Purpose: Defining your purpose gives your writing a clear direction and goal.
4. Context: Understanding the context ensures your content is appropriate and relevant.
Genres are diverse because they cater to different purposes, formats, and audiences - this helps writers communicate more effectively.