https://woocommerce.com/products/cart-notices/

Display custom messages to your customers on the cart and checkout pagesAdd messages anywhere on your site shortcodes are allowed (for example, display promotion notices at the top of a shop or category page)Improve sales and average order value by encouraging spending to receive benefits – giving customers a reason why they should spend more can result in a 50% increase in up-sells!Display dynamic notices with the use of message variables. For example, you can set a minimum amount for free shipping, and the message dynamically displays the difference the customer needs to add to their total to qualify!Set minimum and maximum quantities for discounts using the “Product in Cart” noticeOptionally add a call to action button/URL to encourage your customers to perform the desired action

Changelog

* Feature - Add compatibility with the Cart and Checkout blocks