title: What does <a href="/"> do?
body: <p>I would like to know what the following HTML code snippet does:</p>
  <pre><code> &lt;a href=&quot;/&quot;&gt;&lt;img src=&quot;cat.png&quot;&gt;&lt;/a&gt; 
  </code></pre>
  <p>What does the <code>/</code> value for the <code>href</code> attribute refer to?</p>