The document discusses different elements of online social networks that can effectively develop digital literacy skills. These include: 1. Profiles and portfolios that allow users to establish their identity and curate a personal space to navigate the site and develop a more complex online presence. 2. Photo and video sharing capabilities that engage users visually and allow them to transcend boundaries of time and space. 3. Groups, projects and causes that foster bonding and focus on social issues, presented with links to similar tools for easy access. 4. Social tagging and bookmarking to collectively share and organize web research and information about organizations.