Saving custom templates, tables, reusable units, style sets, and so on within our ribbon means that only we have access to these items.
By exporting these items into a zip file, we easily share any of our custom-created items with our colleagues, so they do not have to reinvent the wheel.
Similarly, importing Custom Items allows us to import a zip file of all Custom settings to be used in creating our documentation.
The video below demonstrates how to export and import Custom Items: