What the plugin doesHandle different shipping costs by single product of your store, so for example you can set different fees for each state, region or city. How you can benefit from it:
You can increase the profit on the sales as you will no longer have to bear the extra shipping costs
You can also manage product variations and the shipping by regions, cities, and states for every single product
You can allow your customers to know the exact shipping costs charged thanks to the summary on the product
