The Add Item tool is used to add a new content item (text, image or table).
The Edit Item tool is used to edit a content item.
The Delete Item tool is used to delete a content item.
The Page Properties tool is used to set titles for the page (in various contexts) as well as to enter the published filename.
The Reorder Pages tool is used to edit the page hierarchy of the site (which is reflected in menus).
The Copy/Paste tool is used to copy a content item to a different location on the page.
The Preview tool pop-ups up a new window showing the current page as it will look when published.
The Publish Page tool is used to publish the current page.