I’m not a developer of ACF, just another user.
I’m not exactly sure what you mean the second part, but ACF is a plugin that requires the modification of templates and the use of PHP on the front of the site. It is an admin tool for developers that aims to reduce the work involved in creating the admin for custom fields and simplifies the getting and displaying of those fields.
The code I posted would go in your template file where you want to show the field values on the front of the site.
