There are important differences across SNS. Sites such as Facebook target the general population, while other sites target a particular niche. For instance, TakingITGlobal.org and YouthNoise.org offer social network services for users interested in addressing social issues such as poverty and human rights (Raynes-Goldie & Walker, 2008). Based on the previous discussion that it is not the specific affordances of a technology but the motivations for using it what matters (Gil de Zúñiga et al., 2011), this study analyzes the effect of informational motivations for using any type of SNS. Furthermore, we focus on information about public affairs that is communicated through online network sites, such as when individuals learn about opportunities for community work, discuss information about hot political issues, and share links to stories in the mainstream media.