People who can access a wiki or a blog fall into two categories: administrators and users. Each wiki or blog can have different access permissions, so you might be an administrator for a few wikis and a user for other wikis.
An administrator (also known as an admin) has privileges that users don't. For example, an administrator can:
Change wiki settings such as:
Changing the wiki image (displayed at the upper left)
Renaming the wiki
Describing the wiki
Setting a contact email
Changing the wiki theme
Change which services are available
Choosing who has access to the wiki and what level of access they have
Changing who can comment or moderate comments
Adding a sidebar to the homepage
Choosing which server address the wiki appears under
There are two types of administrators: server administrator and individual wiki or blog administrator. A server administrator has administrative privileges for all wikis and blogs on the server. An individual wiki or blog administrator has administrative privileges for a specific wiki or blog.