The configuration API provides a central place for modules to store configuration data. This can be simple configuration like your site name, or more complex information managed with configuration entities, such as views and content types.
NOTE: While Drupal 8 has a configuration system that is mostly functional, configuration synchronization does not currently work perfectly. To follow the progress toward making synchronization work, see.
For tasks related to conversion of all core system variables into the new configuration API, see.