Definitions for "Sitename"
An identifier of a site, declared when the site is created. A sitename cannot exceed 64 characters. The sitename does not refer to the actual URL of a website, but is simply a naming convention used for targeting and categorising a site. See also site, Website.
The unique combination of personal data elements that uniquely identifies a single User to the Site. For TriasSoccerCentral, this is the your first name and last name
The unique combination of first and last name that identifies you (as an individual) to the Site
The sitename is how Technical Support refers to your Web site. Your sitename is different from your username.