As you blog and post, the content and articles will become longer. You will quickly find yourself with tens to hundreds of articles. Right from the start, you will want to organize your posts with categories and/or tags to make your blog stand out.
Blog categories
The categories sort posts by themes. You can create as many categories as you need, as you wish.
Example : You write a blog about automobile news. You can sort your posts into categories by vehicle type. Ex: economy cars, electric cars, sports cars etc etc.
Blog tags
The tags are keywords in the post. These words will create a link between similar articles and will cross reference your posts. Standard practice is to have two or three tags per article.
Example : On your automobile blog, you can tag your articles by car manufacturers, the tags link all articles, regardless of the category, that are tagged Bently, Mini, Jaguar, Rolls Royce, Land Rover, McLaren etc etc...