In Shop-Script, a product page URL consists of a fixed and an editable parts. Example: mydomain.com/product/t-shirt/. Here the bold part is editable and the rest is fixed.
The editable product URL part can be edited in the online store backend. To do so, open a product-editing page and click “edit” next to a product storefront link.
Change the editable URL part and save the product.
The editable URL part can be updated for multiple products at once using CSV file import. When importing a CSV file, associate a column containing editable product URL parts with the “Storefront link” property.
The fixed URL part which follows the domain name can be configured using “Storefront → Settings → URLs” setting.