What are labels? How do I add them?
Labels can be one word or a multiple word phrase. Labels are indexed for search with a little less weight as the article title, but multiple labels with similar words can outweigh the title and body of the article, so use labels carefully to balance your search results.
To add labels to your articles, simply click in to Help Center article editor. As you start typing in the Labels field, a list of existing labels appears for you to chose from, or you can add a new label by selecting Add as a new label... or pressing Enter.