Drupal 8 provides an interface to interact with the configuration. You can import, export, and synchronize through the administrative interface by navigating to Configuration and then Configuration synchronization from the menu bar.
Configuration interface
Synchronize configuration
The first tab, labeled Synchronize, allows you to see the state of any configuration that has been exported to the filesystem and compare it to the configuration currently in the database. Each configuration item that contains a difference is listed, along with a button to show the differences.
Synchronize configuration screen
Clicking on the View differences button opens up a dialog that shows the differences between the configuration in the synchronization...