title: Adding Custom Popups using google tag manager
body: <p>When a user lands on a page, I want to show a custom HTML popup. I have Google Tag Manager integrated with the website.</p>
  
  <ol>
  <li>Can this HTML Popup be shown using Google Tag Manager? (script and code to be inserted using Google Tag Manager) </li>
  <li>Is it <strong>frowned upon</strong> / <strong>not advised</strong> to use google tag manager for
  anything apart from tracking?</li>
  </ol>