Staging Server
A Staging Server is a web server used to test the various components of, or changes to a web site before propagating them to a production server.
In the CMS, a Staging Server would be represented as one of several destinations to which content can be published. In practice, after integrating a site and preparing it for launch, the user might first publish the site to a staging server in order to perform quality assurance review. If the published site passes quality assurance review, it would next be published to a production server, otherwise it would then be reworked to correct any problems and republished to the staging server for more testing.