You must assign posts to a category. This allows Graffiti to build very smart and simple Urls which look like this:
site.com/CategoryName/PostName/
However, there are times when you will want to create content that is not organized by a category. Graffiti enables this by using a special category called Uncategorized. Any uncategorized post is not grouped in a category.
An uncategorized post is ideal for a site’s meta-pages, such as an About page, Privacy terms, or Terms of Service. For example, if you created a new post called About and added it to the uncategorized category the url would look like this:
site.com/about/
There are two additional points to be made about uncategorized posts: