it's only needed for FaceBook sharing, don't use social media so not sure what other such sites would require. If you don't use social media it can be ignored.
Tiger manual entry
'Upload path / URL
Some services need to full path to the album page, like Facebook. Unfortunately when you make the album the final address is unknown to the skin (and jAlbum), this is why this box is here.'
Settings>General entry
'This field will be left blank until after an 'upload' has been performed, it will then show the URL path to your web hosted album. Some skins may need to know the URL before being uploaded, for example those supporting social sharing functions. To avoid having to do a 'Make - Upload - Make - Upload' you can manually enter the URL path. The path expected will be your root web address plus the project name e.g.
http://myjalbum.jalbum.net/myProject. If you enter an alternative path you will need to change the suggested upload folder to match what you have entered, otherwise the URL will be wrong.
You may need to refer to the skin manual to ensure it does not specify an alternative method of entering the published URL path.'
