The developer documentation is for coders who want to learn how to extend the plugin with customized templates, additional fields and more.
If you’re not a coder, you’re probably looking for the User Guide.
Business Profile is packed with hooks to make it extraordinarily extensible. It also outputs the contact card using a template, and features a number of template helper functions to help you output Schema.org-compliant markup in whatever form you’d like.
Learn more about adding theme support, customizing templates and some of the many filters that are available.