When buyers place orders, they should be prompted to choose among a variety of shipping options. You can create as many shipping options as you like, but they all calculate shipping costs using one of three methods:
Flat Rate shipping applies the same price to every product in the catalog.
Variable Rate shipping uses a formula to calculate a unique rate for each order by weight, product price, or other factors.
Carrier shipping aligns your shipping processes closely with those of a shipping company. This can help ensure the prices you charge your customers closely match your actual shipping costs.
You can create many options for each method, but remember that every shipping option you create becomes available to ship every product in the catalog.