title: Are web applications supposed to be served at a www. subdomain?
body: <p>I've noticed that a lot of websites redirect you from the unqualified domain to the www. subdomain. Is that the best practice as far as webapps go? </p>
  
  <p>But not everyone does it. For example, heroku.com redirects you to www.heroku.com, but stackoverflow.com does the opposite, redirecting you from www.stackoverflow.com to stackoverflow.com.</p>
  
  <p>What's the best practice here, if there is one, and why?</p>