title: How to add product categories dropdown in Shop page only on woocommerce?
body: <p>I'm using this short code in shop page</p>
  
  <p>[product_categories number="12" parent="0"]</p>
  
  <p>It works fine. But I have to display product categories drop down</p>
  
  <p>[product_categories_dropdown orderby="title" count="0" hierarchical="0"]</p>
  
  <p>it doesn't work.</p>