Help URL
From AgileApps Support Wiki
The help URL is invoked when the clicks the Learn More link in the Gear menu (
).
If this field is empty, the default Help Domain is used, as defined by the Service Provider.
If this field is not empty, and contains a valid URL, it overrides the default help URL for the object. Either an absolute or relative URL can be specified.
The format for an absolute URL is: http://www.examplehelp.com or http://www.examplehelp.com/objectname.
A relative URL does not begin with "http://". That kind of URL is relative to the Help Domain defined by the Service Provider.