When providing a menu link as a tab, Drupal needs to know what the parent menu link of that tab will be. Sometimes the parent will already exist, but other times you will need to have one created. The path of a parent link will always be the same path with the last part left off. i.e, if the path to this view is foo/bar/baz, the parent path would be foo/bar.
Parent menu link
If creating a parent menu link, enter the title of the link.
If creating a parent menu link, enter the description of the link.
If the parent menu link is a tab, enter the weight of the tab. Heavier tabs will sink and the lighter tabs will be positioned nearer to the first menu link.