Here it is:
One of the fundamental building blocks of the WordPress blog
structure is the category. A category is like a folder on your PC. In the WordPress nomenclature, both categories and tags are known as taxonomies. Their sole purpose is to sort your content to improve the usability of your site. Meaning when a user comes to your site, they can easily browse through your content by topic rather than browsing chronologically which is how blogs were initially setup.
When you write your blog posts you assign them to a category. Categories are meant for broad grouping of your posts. Think of these as general topics or the table of contents for your site. Categories are there to help identify what your blog is really about. It is to assist readers finding the right type of content on your site. Categories are hierarchical, so you can sub-categories.
What’s the best way to set-up categories?
Use the keyword phrases you are targeting.
The keyword phrases you have chosen should be used for the names of
Now when you add your blog posts, you can add each blog post to one
category. This helps to increase the ranking of your blog.
It’s that simple.
Try it. It does make a difference.