A computer interface to an online store is also used in a business method. The interface has one or more product pages that have product information about one or more products. The product information is obtained from the online store. An analysis data window is presented concurrently with and in proximity to the respective product page. The analysis data window has analysis data about the effectiveness of the respective product page. In a preferred embodiment, the type of analysis data is determined by a type (class) of analyst that uses the interface. A method of doing business uses the interface to determine the effectiveness of and improve various information presented on the product page.