title: Show Woocommerce product pages default description for empty descriptions
body: <p>Is it possible to add Woocommerce Product Default Description for all new added product pages in the backend product description area as a default text for example ( free of charge ) or a default function which will generate a certain action <strong>but only for the products who doesn't have a product description value</strong></p>
  
  <p>All that is needed is to get the description have a default added value for the new added products in the description below</p>
  
  <p><a href="https://i.stack.imgur.com/OFRkv.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/OFRkv.png" alt="enter image description here"></a></p>
  
  <p>Can anyone help in this ?</p>
  
  <p>I found this which do the magic but for the product short description, but i want it to the product description itself</p>
  
  <pre><code>add_action( 'woocommerce_single_product_summary', 'bbloomer_echo_short_desc_if_empty', 21 );
  
  function bbloomer_echo_short_desc_if_empty() {
     global $post;
     if ( empty ( $post-&gt;post_excerpt  ) ) {
        $post_excerpt = '&lt;p class="default-short-desc"&gt;';
          $post_excerpt .= 'This is the default, global, short description.&lt;br&gt;It will show if &lt;b&gt;no short description has been entered!&lt;/b&gt;';
          $post_excerpt .= '&lt;/p&gt;';
        echo $post_excerpt;
     }
  }
  </code></pre>