How to tag your content
Tagging your content makes it much easier to find via the search bar. Users can also click a tag to instantly find similar content.
Any page or book can have tags and sub-tags. Here's some examples:
When editing a page, check the right hand side of your screen to add tags. (Books use a different interface)
Click the 'tag name' field to see tags which tag types already exist. For example, you could add the 'Category' -> 'Unity' tag.