We often get this general question from our theme subscribers who use WooCommerce capable WordPress themes:
Question: I see this warning message on the dashboard… Do I need to action this notification?
Your theme (Pure and Simple Child) contains outdated copies of some WooCommerce template files. These files may need updating to ensure they are compatible with the current version of WooCommerce. You can see which files are affected by the system status page. If in doubt, check with the author of the theme.
Answer: In general, if you see no display issues on your site, you can just dismiss this message and ignore it.
The WooCommerce plugin often updates their templates. Our themes add some customization to these page templates. When Woocommerce comes out with a new version – our version gets outdated – this is just a version number mismatch. Nothing to worry about.
After some time we always update our WooCommerce templates too to keep up with the new version.