Open the Activities overview.
At the bottom right of the screen, click on one of the four workspaces to activate the workspace.
Click on a workspace in the workspace selector on the right side of the screen to view the open windows on that workspace.
Click on any window thumbnail to activate the workspace.
Press SuperPage Up or CtrlAltUp to move to the workspace shown above the current workspace in the workspace selector.
Press Ctrl Alt← to move to the workspace shown left of the current workspace on the workspace selector.
Press SuperPage Down or CtrlAltDown to move to the workspace shown below the current workspace in the workspace selector.
Press Ctrl Alt→ to move to the workspace shown right of the current workspace on the workspace selector.