Add categories and tags

- In WordPress, posts are organized … based on categories and tags. … Both to find in the document context in the side bar, … on the right hand side. … Categories are the main organization system or taxonomy, … used to group related posts together. … Tags, are an optional additional sorting system used to … signal looser connections between posts. … What exactly the difference is between these two, is … explained in the next movie. … All posts must have at least one category and can have as … many categories as you like. … If you don't assign a category to a post, it will … automatically filled under the category … called un-categorized, which is not very useful. … If you want you change this default category to … something more meaningful, you need to go to settings, … writing, and then under writing, you change the default … post category to any of the other categories they've … already registered on the site. … My rule of thumb here is anytime I write a post, … I immediately categorize it so I don't forget later. …