This bundle add an admin interface to manage custom configuration values that can be used in your frontend application.
A configuration value is store in a group and a group rely to a section. It's easy to get a configuration value by its path :
section_name:group_name:value_name
To retrieve a value from a controller:
$this->container->get('admin.configuration.manager')->get('section_name:group_name:value_name');
To retrieve a value from a twig template:
{{ admin_configuration_get('section_name:group_name:value_name') }}