title: Difference between wp_postmeta and wp_woocommerce_order_itemmeta tables
body: <p>Seems like both tables are storing metadata of orders in woocommerce. But how to know what data to store to where?</p>
  
  <p>I'm currently using update_post_meta function such as,</p>
  
  <pre><code>update_post_meta( $order_id, 'newcheckboxfield', esc_attr($_POST['newcheckboxfield']) 
  </code></pre>
  
  <p>to add a custom field (newcheckboxfield) at the checkout for each order. But I prefer if the meta data goes to wp_woocommerce_order_itemmeta table as that seems to be storing relevant data for each order, am I right?</p>