Systems and methods for designing and operating an electronic store are described. Various embodiments (1) permit a merchant to organize and advertise descriptions of product inventory over the Internet, (2) permit Web page information to be extracted on-demand from a product inventory database, and (3) permit Web pages to be automatically customized to shopping behaviors of individual consumers. In some embodiments, a graphical store design user interface of a Web browser displays a hierarchical representation of products and product groups on an electronic store. A user manipulates icons of the Web browser store design user interface to cause a Web server to modify relationships between products and product groups stored in a product information database. A store designer creates HTML template files, embeds database and customized references within the template files, and assigns template files to groups or products of the electronic store.