When you are on the single product page, and you have a non-empty product long description, a “Description” tab appears below the product images. Unfortunately, not only the tab label is “Description”, but also the tab H2 heading. This sounds and looks horrible, so here’s a way to completely remove it.
Alternatively, you can use this other snippet in order to rename it: https://businessbloomer.com/woocommerce-rename-product-description-single-product-page/
Snippet (PHP): Remove “Description” Heading @ WooCommerce Single Product Tabs
/** * @snippet Remove "Description" Title @ WooCommerce Single Product Tabs * @how-to Get tutoraspire.com FREE * @sourcecode https://tutoraspire.com/?p=97716 * @author Tutor Aspire * @compatible WooCommerce 3.5.3 * @donate $9 https://www.tutoraspire.com */ add_filter( 'woocommerce_product_description_heading', '__return_null' );