When you use the URL Component Alias feature in SuiteCommerce, note that some configuration is required to fully integrate facet URL aliases. Modify the configuration to use the same facet values you set on the URL Components for Facets in NetSuite. Refer to Faceted Navigation for detailed information on customizing these values.
By by enabling URL Aliases, you consolidate all your different variations into one main URL component and avoid duplicate content. For more information, contact your Professional Services representative. See URL Components.