Tags provide a useful way to group related posts together and to quickly tell readers what a post is about. Tags also make it easier for people to find your content. Tags are similar to, but more specific than, categories. The use of tags is completely optional.
Tags can be displayed at the bottom of posts, on the individual post view, and/or in the sidebar. You can assign multiple tags per post.
The Difference between Categories and Tags
This example post demonstrates the difference between categories and tags:
Adding Tags within a Post
You can assign or add new tags to posts before you publish them using the Post Tags area to the bottom right of the post editor:
You can add tags one at a time by clicking the Add button or hitting the Enter/Return key on your keyboard after typing each tag. Or you can add multiple tags at a time by separating them with a comma as you type.
To remove a tag from the post, click the small X icon next to the tag.
To choose from your most commonly used tags, click Choose from the most popular tags. Then, click on the tags you want to assign to the post.
Adding Tags via Your Dashboard
You can add new tags and manage existing ones from Posts -> Post Tags in your dashboard.
You will be presented with a list of your existing tags, a tag cloud showing your most popular tags, and a method of adding new tags.
The Posts -> Post Tags page in your dashboard shows a list of tags you’ve used, as well as the name and number of posts belonging to each tag. If you move your mouse over a tag a set of options will appear allowing you to edit, quick edit, or delete that tag:
If you click on Quick Edit the tag will change into an edit box and you can rename the tag quickly:
If you click on Edit you will be taken to a separate page where you can edit the name and description. This functions exactly the same as in adding a tag.
Clicking on Delete will delete that tag.
Converting Tags to Categories
If you change your mind about using tags and instead want to convert them to categories, you can do so using the tag to category converter. At the bottom of the manage tags screen is a link to the tag to category converter.
Clicking this will take you to a screen where you can select which tags to convert to categories. Make your selection, click on convert tags to categories. Your tags will be removed and categories will be assigned to the posts that used to be in those tags.