Taking my example from the FamilySearch Research Wiki, there are a number of different namespaces including the “Talk” pages. A Talk page is a separate page associated with a main page that is provided to make a place where a discussion or talk can occur about the content of the main page. Here is a list of some of the namespaces in the Wiki:
- User Talk
- Project Talk
- File Talk
- Template Talk
- Help Talk
- Category Talk
You do not need to know any of this to merely use the Research Wiki to look up information, but if you start contributing to the Wiki, you will see the need to understand these pages. But if you are searching for information on the Research Wiki, you can choose which of the namespaces you wish to search or search all of them.
More information can be found in the Help:Namespaces page in the FamilySearch Research Wiki.