Although you can create a site on Windows SharePoint Services based on the wiki Web site template, the use of wikis is not limited to those sites. Wikis can be used within any team site by making use of the wiki page library. A wiki page library allows you to create an interconnected collection of Wiki pages.
In the following exercise, you will create a wiki page library and edit the home page.
OPEN the SharePoint site in which you would like to create a wiki page library. The exercise will use the http://wideworldimporters site, but you can use whatever site you want. If prompted, type your user name and password, and then click OK.
BE SURE TO verify that you have sufficient rights to create a wiki page library. ...