Configuration synchronization
Detailed coverage of configuration management is beyond the scope of this beginners' book but in short, this section empowers you to export either the entire configuration of your site; content types, taxonomies, views and so on as a single (zipped) archive or to choose to target one particular item such as a view to be exported as pure code.
It also enables you re-import and even provides a neat comparison view of what's changed in your configuration since you last exported it.
This section is enormously useful when it comes to deploying new or updated configuration from a development site to live.