Meta:Protected pages

Protected pages are pages that cannot be edited by certain users. Pages can be semi-protected, meaning they can only be edited by autoconfirmed users, or they can be fully protected, meaning they can only be edited by administrators.

Requesting protection
Users are free to request protections of there own user page(s) on Administrators' noticeboard or just ask a Meta administrator.

Creation protection
Creation protect is when a page is protected from being created.

These pages are also known as "Protected Titles" and this process is commonly referred to as "salting" a page.

This is commonly used to stop a page from being re-created after being repeatedly deleted.