“Categorize” your posts so that it will be easier to navigate our site later on.
After you finish typing your post up, choose the appropriate “category” from the right side of the screen. For example, after you type up your “introduction” blog, you should make sure to check off “introductions” otherwise the post will simply show up as “uncategorized.”
For additional help, check out this “how to” video on WordPress.tv: Adding Categories and Tags to your Post
