You can contribute content in two ways on a workspace, either by creating a page that can be edited online, or by uploading a file that will be downloaded and used by others.  Every page or file has it's own unique URL which can be accessed from anywhere in the world, as long as the user logging in to the URL has access to the page or folder.  Remember, anything done within a personal workspace is private to you unless shared, so feel free to experiment with uploading files or creating pages, as anything you do inside a personal workspace is private to your account.

To create a page, click the Create Page button in the upper right corner. 

There are also methods to create pages by linking to the new page from within the editor, or through the pages and files manager.  More information on creating pages can be found here.

You can also email content directly to the personal workspace, which may be ideal if you don't want to have to log in to add new content.  More information on email to workspace can be found here.