The document provides a comprehensive introduction to the GoodRelations ontology for enhancing e-commerce data on the web, detailing the integration of RDFa and the capabilities of Yahoo! SearchMonkey. It outlines various scenarios for using GoodRelations, from minimal to comprehensive, and includes hands-on exercises for annotating web shops and querying the web of data. The document also emphasizes the design principles, licensing, and structural frameworks necessary for effectively utilizing semantic web data in e-commerce applications.