Polls are used to gauge public opinion on a variety of topics. Type POLLS for a list of polls currently being run that you are eligible to cast your vote in. You will notice all polls have a unique number, much like elections, and you can find out further information on a poll and its participants by typing POLL followed by that unique number.
All polls have a topic, usually some important question that opinion is being gathered on. Unlike elections, votes can be made public (though ballots can be secret on occasion) and you are allowed to vote as often as you like - though advised to use this privilege responsibly. To make your opinion known on a poll type VOTE followed by either FAVOUR or AGAINST and then the poll number, e..g. VOTE FAVOUR 150 will declare yourself in favour of whatever is being proposed in poll 150.