title: Can I modify WooCommerce functions within the 'wc-template-functions.php' file or should I stick with the 'functions.php' file for such modifications?
body: <p>Why is it the preferred choice, to have WooCommerce function modifications placed inside the theme's 'function.php' file?  Overtime, this would make the file rather large.  I am of the understanding that it is generally better practice to have lots of well organised smaller files, rather than fewer much larger files.  </p>
  
  <p>With this in mind, what is wrong with copying the 'wc-template-functions.php' and 'wc-templates-hooks.php' files into your theme (whilst keeping its file hierarchy) and modifying these files accordingly?</p>
  
  <p>As a side request, from a relative newbie to the WooCommerce platform, I would appreciate if I could get a 'Yes, that works' or a 'No, I have missed something out' response to my below understanding of how the WooCommerce; files, hooks, actions and templates all work with one and other     </p>
  
  <p><strong>My Understanding:</strong></p>
  
  <ol>
  <li>The WooCommerce functions are registered within the 'wc-template-functions.php' file.  For the purpose of this explanation, I would like to refer to the <code>woocommerce_breadcrumb</code> entry.</li>
  <li>WooCommerce then uses the 'wc-templates-hooks.php' file to call the registered function by using a typical entry such as <code>add_action('woocommerce_before_main_content','woocommerce_breadcrumb', 20, 0 );</code>  This simply directs <code>woocommerce_breadcrumb</code> to be called within the <code>woocommerce_before_main_content</code> hook.</li>
  <li>WooCommerce is then able to output the above by placing <code>do_action( 'woocommerce_before_main_content' );</code> where necessary.  In this case, within all of the Template files.</li>
  </ol>