Routing is important for any sites, and it’s even more important for a Commerce site – it can help driven sales. People nowadays search for everything, and ranking higher in the search results yield much better chance of your products being purchased. There are two routing systems in Episerver Commerce (as always!). The old one is based on SEO URI, has been there since Commerce R1, and the new one, HierarchicalCatalogPartialRouter, which is a partial router, was introduced in Commerce 7.5.
The SEO Uri approach
This approach is based on the SEO Uri, so the link to your product will be in form of http:///yourproduct.aspx. Note that .aspx is the default, but you are free to choose another extension, or even no extension at all. The SEO Uri can be edited in both Commerce Manager and Catalog UI
Those information are stored in CatalogItemSeo for both Nodes and Entries, which each row represents the information of one node or one entry in one language. Note that only the Uri is unique and is used by the system, it’s up to your site implementation to utilize other information such as Title, Description – just follow best SEO practices.