This document discusses how social music platforms can utilize Semantic Web technologies like FOAF, SIOC, and MOAT to represent user identities, social connections and relationships, and semantic tagging of music. It outlines how these semantic representations of social music data could enable more advanced recommendations that take social relationships and preferences into account. The talk covers topics like Web 2.0, social networking, tagging, and how the Semantic Web can be applied to represent the social aspects of online music sharing and consumption.