There are now four different wikispace types. These types are intended for different kind of collaboration.
Blank Space - the default blank space without any ready made features
Documentation Space - a space with ready made features for documenting
Knowledge Space - a space for faq:s resources and best practises
Team space - a space design for project teams and collaboration teams
If you are not sure of what you will be doing with your wikispace, or if your intended use does not fit the predesigned layouts, it's best to start with a blank space.
The Create Button
To make it easier for you to create content, there is now a Create button in every Confluence core layout, and even on the wiki dashboard (the front page)
Create Button in the dashboard layout. It can be found in the same place in other core layouts also.
After clicking Create button you first choose the space that you want to create a space into, after that you can choose the type of page to create. These ready made page content types are called Blueprints. You can learn more about them from Atlassian :