title: Superset How to add a filter in dashboard
body: <p>Superset comes with an example named "World's Bank Data". In its dashboard, there is a filter named "Region Filter". How can I implement this? Is there a tutorial on this? Any pointer or a quick explanation will be greatly appreciated.</p>
  
  <p><a href="https://i.stack.imgur.com/JnnaA.gif" rel="noreferrer"><img src="https://i.stack.imgur.com/JnnaA.gif" alt="enter image description here"></a></p>