This document discusses implementing semantic SEO through GoodRelations vocabulary and RDFa markup on product pages for a major online retailer. It provides benefits like improved rendering on Yahoo and displaying price information in Google. Implementing requires adding 15-30 lines of RDFa markup per template with minimal increase to page size and load time. Resources for getting started include a snippet generator and Magento extension. Overall it is a straightforward way to gain SEO and search benefits with little downside.