You don't need to add keywords to your articles for your content to be searchable. By default, we indexed your title, body, permalink, meta description, search phrases, and PDFs. Your articles should be searchable by any word you use in your con...
You might want to hide the table of contents completely in your knowledge base--maybe to save some screen real estate, or to force people to work through navigation, or simply because your knowledge base isn't complex enough to need a table of c...