Product Meta Descriptions

Hello,

Thank you for contacting Rank Math for help with setting WooCommerce product descriptions as the product meta description.

You will have to create a custom variable for the product description. This works in both the free and PRO versins of Rank Math. To do that you will have to add the following code snippet to your website:

add_action( 'rank_math/vars/register_extra_replacements', function() {
	rank_math_register_var_replacement(
		'woo_full_desc',
		[
			'name'        => esc_html__( 'Woo Full Desc.', 'rank-math' ),
			'description' => esc_html__( 'Woo Full Description...', 'rank-math' ),
			'variable'    => 'woo_full_desc',
			'example'     => woo_full_desc_callback(),
		],
		'woo_full_desc_callback'
	);
} );
function woo_full_desc_callback() {
	global $post;
	if ( empty( $post ) ) {
		return 'Product Description';
	}

	return wp_strip_all_tags( $post->post_content );
}

You can follow this guide for how to add the code to your website: https://rankmath.com/kb/wordpress-hooks-actions-filters/

Hope that helps. Please let us know if you have questions.