Location numbers will work as a Different locations for One product like you are selling one product in different locations then you have to increase of locations number.
To ad more than One Number of Locations please go to Wp-Admin Dashboard > Classiads Option > Listings Level > Ad here Location Numbers Available.
How it will work.
How to Allow all Locations:
Remember you have to select World Wide for no any Restrictions “Restriction of address fields for the default country (autocomplete and search)” by going to Wp Admin Dashborad > Classiads Option > Listings Settings > Map Settings.
Hope this Article will help you.