You have the ability to create descriptions and choose categories for your Blog posts. The description can be a short summary regarding the contents of the Blog post which will be displayed in the list of your posts.
Choosing a Category for your Blog post allows viewers to filter relevant posts, and choose them from a drop-down list.
Here is how to get started:
After creating a Blog, you will see a page that looks like this:
Create a new post, and you will be presented with the option of entering in a description and category:
By entering in a category, a drop-down menu will appear to your visitors when they view your Blog. This will allow visitors to filter irrelevant posts when viewing your Blog.