Backend Tags are not visible to website visitors but can be used to control the visitor experience, such as aiding in search results or in prefiltered data listings. Backend Tags are site-specific and are shared across News, Events and People Directory features.
Example use cases include tagging particular outreach program names or the name of an event series.
In Content Editor:

In Content Editor:
In Content Editor:
In Content Editor:
In Content Editor:
In Content Editor: