A workspace is where your team works together. Projects, lead lists, emails, campaigns, sending domains and sender profiles belong to the workspace. You invite teammates to the workspace.
The organization represents your company. The subscription plan and its allowances belong to the organization.
When you sign up, your account opens with one workspace, which is enough for most teams. In an organization that is not a personal one, an Owner or Admin can create more workspaces under the same organization with New workspace in the workspace switcher. For switching and creating workspaces, see "How do I switch between workspaces, and create a new one?".
You can edit the workspace name, its address and your company website on Settings › Workspace.