WooCommerce has a postcode validator built in which is used to find appropriate shipping methods on the checkout. In case you are going to extend some shipping methods or build something else with postcodes, you will learn here how you can use that for your own solution.
Sometimes, we will need to render dynamic content and we usually used shortcodes for that. But shortcodes did not show the output in the editor. With ServerSideRender component we can now also see what will happen on the front while using Gutenberg.