The document discusses how websites can leverage social web standards and platforms to enhance their user experience and engagement. It outlines key components of a user's online identity and how standards like OAuth, OpenID, microformats can help access profiles, reputation, activities, social graphs and more. Integrating these standards allows sites to lower barriers to entry, improve retention, drive more traffic and gain insights into their user base by tapping into existing social functionality rather than reinventing features. The emerging open and social web presents opportunities for sites to intelligently leverage new building blocks and participate in the growing online ecosystem.