As social networks have evolved, so have the ways in which people share, consume, and discover information. The consumer has now become a brand's most influential stakeholder, wielding the ability to influence friends and peers significantly more than advertisers. This shift in power has caused a corresponding transformation in social networks and how brands use them to engage with and market to consumers. Facebook's Open Graph, for example, is a formidable force that is changing the way brands and consumers interact.










