title: Trello staying updated?
body: <p>How does <a href="http://trello.com" rel="noreferrer">trello.com</a> keep all the users screens updated with new information as it comes in?</p>
  
  <p>For example, if I change something on my screen, it automatically changes on all the other users screen who are also on that page...Are they just constantly refreshing the page or is their something else going on?</p>