Static block is a useful feature that makes adding content to your site easy and convenient. Static blocks allow you to add additional content for products, create footer layouts, facilitate the creation of promo popups, etc. Static blocks can be used anywhere on your site to display text, images, sliders, widgetized sidebars, etc. Go to Dashboard > Static Block > Add new, and you'll be able to build a block layout in no time.
Note:If you want to use WPBakery builder to build a block layout, don't forget to select it in the WPBakery settings.
If you want to display static block using a shortcode, you will need Static Block ID. You can find it in the URL of your static block as you edit it. See the image below: