define( 'WC_TEMPLATE_DEBUG_MODE', true );
WooCommerce has two very nice debug features often overlooked. One of them being the Template Debug mode. This tool will disable template overrides for logged-in administrators for debugging purposes and should always be tried out as a first step, when dealing with WooCommerce issues related to layout and content. It is also very helpful when checking for conflicts.
Many themes overwrite WooCommerce template files. A behaviour that can cause malfunctions.
Go to WooCommerce -> System Status and navigate to the Tools tab. The relative URL is:
Scroll down to “Template Debug Mode”, tick the box and hit Save changes.
Here is a small screencast in addition.
View this screencast in a new Tab.
As stated above this will be only active for logged-in administrators. You can take your time debugging as your shop visitors will not see any differences.