Value:
Indicates whether or not the page is being blocked by your robots.txt file.
Background:
For certain files or directories, it is beneficial to prevent the search
engines from indexing them. On the other hand, it would be harmful to inadvertently
block a page that we did want indexed for possible ranking.
Example Robots.txt file:
# Exclude Files From
All Robots:
User-agent: *
Disallow: /members/
Disallow: /bin/
Disallow: /_notes/
Disallow: /cart/
Disallow: /account/
# End robots.txt file