<p>Voting is mainly for sorting content so that good content is sorted above bad content. Obviously, we want good content to be sorted above bad content, so if you vote for things you think are good, then all is good and you are helping the site. But if you are not serious and vote for whatever, even really bad posts, you are not helping the site. Also note that you do not want to trigger <a href="http://meta.stackexchange.com/q/126829/163868">the serial voting alarm</a>.</p>