Part of the confusion with Steemit lies in the different ways that the currency is presented to users.
At the root is the currency Steem, which is the typical transferrable, fungible, freely moveable token akin to bitcoin, ethereum or any other cryptocurrency. But that same Steem can be put into two different types of smart contracts depending on the particular utility an individual wants.
The first is called Steem Power, which provides utility and leverage. Steem Power is the backbone of an account's voting-potential. In other words, the more Steem Power an individual has, the stronger their vote is on Steemit.