Site
The Site node represents the homepage of your site. It also holds the settings for the Language Overrides. The content for the Site node is made up entirely of content widgets found in in the content section of the Site node.
Page
The Page node allows you to create flexible page layouts using a selection of content widgets.
Feed
1 item
Global content
Global Content is a way for you to create widgets that you will then later be able to use on other pages via the Global Content Widget.
People
The People node enables you to add your team to the site. Start by creating the the People node in the root of your content tree.
Sitemap
The Sitemap node should be placed directly under your Site node. 
Search
The search is activated when you add the Search node under you Site node. If you would like to disable the search, simply remove the Search node.