Workspaces segregate your 1to1Core account into virtually separate databases, controlling internal contact distribution for users in the system and sets up divisions for access control and permission. This may stop you as a user from accessing content that others in your organization have access to. It also makes your user profile look cleaner as you don't have content from other divisions cluttering up your space. Controlling permissions and workspaces will be handled by an Administrator for your account
Workspaces may mimic your company's organizational structure, whether that be geographical, by division, or even by client. Each user is part of one or more workspaces, and can only see data that is a part of one of those projects. Controlling and administrating workspaces will be covered in the Administration section of the manual
A Contact in several Workspaces
If a user clicks the tab, whatever workspaces are listed out under that tab will be displayed.