A site is a logical unit of data that is normally used to model a collection of physical plants. Every plant within a site has a unique identity. You access a site by opening the SmartPlantv4.ini file, which contains the database type, connection alias, and the schema information for the site and the site data dictionary. The site schema basically keeps track of the plants in the site.
The Site Server node is the root directory for each site when opened in Smart Engineering Manager.