Help URL
From LongJump Support Wiki
The custom help URL is invoked when the object's Help icon () is clicked.
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.
Learn more: Custom Help Domain