SilkyPress

This plugin simply expands the tabs in the single-product page. It will remove the tabs (Description, Reviews or other custom tabs) and show only the content of the tabs one after another.
You can enable the tabs expansion only for desktop or only for mobile devices. Check the settings on the Woocommerce->Settings->Products->Display page, as shown in the <a href="https://ps.w.org/woocommerce-extend-tabs/assets/screenshot-2.png" rel="nofollow ugc">screenshot</a>.
The plugin supports WooCommerce tabs added by other plugins. The content of all of your tabs will be shown one section after another.
If you liked this plugin, feel free to play around with our other free plugins: <a href="https://wordpress.org/plugins/custom-css-js/" rel="ugc">Simple Custom CSS & JS</a> and <a href="https://wordpress.org/plugins/wp-multi-step-checkout/" rel="ugc">WooCommerce Multi-Step Checkout</a>.

Expand Tabs for WooCommerce

Working with Woo can be a pain, love it when easy and efficient plugins like this exist.

Fantastic

Yes it works out of the box. But what it does it to completely remove default scripts from Wordpress and insert modified script without tab-code. What does that mean? If the WC-Team do changes to the important single-product.js script in future, the plugin author has to adapt those changes to the modified file!
unfortunately it is not really possible to avoid this because WC-Team has no hooks inserted for this to overcome. Only easy and nearly maintainable solution would be custom javascript in the footer:
$( '.wc-tab').show();
and css:
.wc-tabs-wrapper .tabs.wc-tabs {
      display: none;
}

its up to you if you prefer client und server side solution.

Attention! It needs maintenance all the time

Expand the tabs in the single-product page.

SEO Plugin by Squirrly SEO vs Expand Tabs for WooCommerce