Polls are a way for VIP players to make their opinion known on features that should or shouldn't be added to the game, as well as other things.
Any player can see the results of closed polls by viewing the polls screen from the home page.
Polls will be used to focus development. The supermajority (generally speaking, but exceptions can be made) of votes will determine specifics of features.
This will be a good check to determine if the development team are on the right track with features and assuring that high-quality features are added to the game that players really want.