View-source shows that it&#x27;s used for images in tags.<p><pre><code>  &lt;img src=&quot;&#x2F;&#x2F;i.stack.imgur.com&#x2F;tKsDb.png&quot; height=&quot;16&quot; width=&quot;18&quot; alt=&quot;&quot; class=&quot;sponsor-tag-img&quot;&gt;</code></pre>