The Divi Builder comes in two forms: The standard "Back-end Builder" and the front-end "Visual Builder." Both interfaces allow you to build exactly the same types of websites with the same content elements and design settings. The only difference is the interface. The Back-end Builder lives inside of the WordPress Dashboard and it can be accessed along with all of the other standard WordPress settings. It sits inside the WordPress UI and replaces the standard WordPress post editor. It's great for making quick changes while you are inside the dashboard, but it's also confined by the dashboard and is rendered as a block-based representation of your website. This tutorial will be focusing only on the visual builder.
The all new Visual Builder, on the other hand, allows you to build your pages on the front-end of your website! It's an amazing experience and allows for much faster design. When you add content or adjust design settings inside the visual builder, your changes appear instantly. You can click onto the page and just start typing. You can highlight text and adjust its font and style. You can add new content, build your page and watch everything happen right before your eyes.