title: slug Django field; do we need this?
body: <p>I am beginning to learn Django and get this data related &quot;slug&quot;:</p>
  <blockquote>
  <p>A short label for something, containing only letters, numbers, underscores or hyphens. They’re generally used in URLs. For example, in a typical blog entry URL:</p>
  <p><a href="https://www.djangoproject.com/weblog/2008/apr/12/spring/" rel="nofollow noreferrer">https://www.djangoproject.com/weblog/2008/apr/12/spring/</a>
  the last bit (spring) is the slug.</p>
  </blockquote>
  <p>Why do we need this and how to use?</p>