Page is a not externally linkable
-- Google SEO News and Discussion
netmeg - 9:27 pm on Mar 19, 2012 (gmt 0)Thread source:: http://www.webmasterworld.com/google/4431011.htm
It could be a quality signal. It's definitely a requirement for AdSense.
Brought to you by WebmasterWorld: http://www.webmasterworld.com