svil4ok

Get tags on every single post (is_single()) and put them in meta keywords tag in header (wp_head()). Otherwise it’ll use the keywords define in $default_keywords. Get the_excerpt() and put it in meta description tag in header (wp_head()). Otherwise it’ll use the description define in $default_description.
Requires the wp_head() tag !

Meta Keywords & Description

thomascharbit

Add a description to all WooCommerce shipping methods on cart and checkout pages. 
Compatible with WPML and Polylang for translations.

Shipping Method Description for WooCommerce

Add a description to all WooCommerce shipping methods on cart and checkout pages.

Meta Keywords & Description vs Shipping Method Description for WooCommerce