- Social networks in MMOs can be defined as the social structures and relationships that develop between players through gameplay and interaction tools. They often resemble real-world social networks. - EVE Online exemplifies how robust social networks form in MMOs. Players organize into corporations and alliances that may include thousands of members and function similarly to companies and nations. Communication tools are essential for coordination. - As player groups grow larger, game designers must consider how to support emerging leadership roles and social hierarchies to ensure networks remain fun and don't disrupt new player experiences. The lines between MMOs and social media will continue to blur as virtual communities deepen.