" The fundamental insight of social network analysis is that a person's position in the network is an indicator of how influential they are.
This is because influential people are more likely to acquire connections, but also because having more connections in itself makes you more influential.
Put another way, it's difficult to imagine how someone could be influential on Twitter without being followed by others interested in their topic. Without followers, how would they be able to express their influence? "
Via Jeff Domansky