The zip file contains six Divi Layouts: 2 sections, 2 rows and 2 modules.
Unzip the file and import the XML into your WordPress installation and start using section dividers on your page.
You can load the layouts on any page where you are using the Page Builder.
With the Section layouts you don’t need to do anything. Load them, add your content, done.
When using Row layouts, remember to set the top or bottom padding of the Section to 0.
When using Module layouts, remember to set the top or bottom padding of the Section and the Row to 0.
For detailed instructions check this article.