The Content staging module allows you to store separately the content in development, staging (editing) and production (live) environment. It allows you to easily transfer document and object changes to another server or make a complete synchronization of documents and objects from one server to another.
You can manage content staging at CMS Desk -> Tools -> Content staging.
For more details and information about Content staging please refer to the Module Content Staging chapter in Kentico CMS Developer's guide.