Page Builder is an area for developers to input code to customize the content displayed on your page. As long as your static html is wrapped in a <div> element, your clients will be able to edit the content you have build without looking at code, by using Visual Editor.
Where can you find Page Builder?
Is there anything you can use with Page Builder?
You can use Toolbox to easily output data from across your site via point and click. Check out this document for more information.
You can also use our free Layout Library which contains ready made designs that you can copy and paste into your page builder and customize. These contain layouts for many different types of areas on your site and are fully responsive and optimised.