All video platform titles undergo an automated metadata tagging process, which aids behind the scenes with search depth and accuracy.
Not sure what we mean by a "tag"? A tag is a non-hierarchical keyword or term assigned to a piece of information (in this case, a video). This kind of metadata helps describe an item and allows it to be found again by browsing or searching.
In addition to the tag enhanced search, the tags are also available in the Now Playing section of the full title:
Clicking on a tag will return other content with the selected tag in the form of a search results page.