Categories and Tags
WHAT IS A CATEGORY
The category is one of the default taxonomies in WordPress. You can use categories to sort and group your blog posts into different sections. For example, a news website might have categories for their articles filed under News, Opinion, Weather, and Sports. Categories help visitors quickly know what topics your website is about and allows them to navigate your site faster.
CATEGORIES VS TAGS
One of the biggest differences between tags and categories is that all WordPress posts must be filed under a category, but they don’t have to have tags.
Categories are meant for broad grouping of your posts. Think of these as general topics or the table of contents for your WordPress site. Categories are hierarchical which means you can create sub-categories.
Tags are meant to describe specific details of your posts. Think of these as your site’s index words. They let you micro-categorize your content. Tags are not hierarchical.
USING CATEGORIES
WordPress lets you put a post into multiple categories. This could be several parent categories, or a parent category plus a subcategory or subcategories. You should only assign posts to multiple categories if it makes the most sense for your readers. If you do use multiple categories, then try to avoid putting one post into two or more main (parent) categories. Each post should fit within one main category. *If you don’t give your post a category, WordPress will automatically assign it to the default category. This is called “Uncategorized”.
HOW TO CREATE CATEGORIES
1. From within a Blog Post - If you need to add a new category while you’re editing a post, just click the Add New Category link below the list of your existing categories and then click 'update': https://d.pr/i/Km2dIb
2. From the Categories Editor - You can also add a category directly from the Posts » Categories screen. Type in a name for your new category and add a slug. You can create URL friendly slugs for your posts using lowercase letters, numbers, or hyphens: https://d.pr/v/s8eSoE
* to quickly add a category to a post without having to open the post, you can select Quick Edit and checkmark/uncheck categories of choice: https://d.pr/i/VbcJMH