title: When should I use a trailing slash in my URL?
body: <p>When should a trailing slash be used in a URL? For example - should my URL look like <code>/about-us/</code> or like <code>/about-us</code>?</p>
  
  <p>I am fully aware of the SEO-related issues - duplicate content and the canonical thing; I'm trying to figure out which one I should use in the context of serving pages <em>correctly</em> alone.</p>
  
  <p>For example, my colleague is thinking that a trailing slash at the end means it's a "folder" - a "directory", so this is not a correct style. But I think that without a slash in the end - it's not quite correct either, because it almost looks like a folder, but it isn't and it's not a normal file either, but a filename without extension.</p>
  
  <p>Is there a proper way of knowing which to use?</p>