Abstract: A method of retail engagement controls a commerce system. A text string on a webpage is identified that relates to a product or product preference. The text string is identified by a web browser plugin. The text string is matched to a product available for purchase at a retailer. Information about the product is displayed adjacent to the text string. A hyperlink is established to add the product to a shopping list. The product is added to the shopping list by clicking the hyperlink. A plugin adds the product to the shopping list. The hyperlink is established in a popup menu or within the webpage. A deal is negotiated for the product at a retailer. A list of affinity products is displayed. A list of substitutable products is displayed. An affiliate fee is paid to the owner of the webpage.