Content Blocks are areas of a web page that can be assigned to certain people or groups. This allows you to allow multiple users or groups to edit a single page without having to worry about anyone's content being mistakenly changed.
To create a content block:
Go to the Edit Content window from the page where you want to insert the Content Block.
Place the cursor where you want the Content Block to go in the content window.
Click on the Add Content Block window button.
The Content Block will go where your cursor was. Anything between the <contentblock> and </contentblock> tags is in the Content Block.
Click on the Save and Publish button.