Mission Control offers a bird's-eye view of all your open windows, desktop spaces, and any apps in full screen or Split View, making it easy to switch between them. The Spaces bar at the top of the Mission Control window contains thumbnails of each desktop space and each window that is in full screen or Split View.
Add spaces in Mission Control
Open the Mission Control app
Add a space by moving your pointer to the spaces bar and clicking the add (+) button on the right
When you have multiple spaces, you can switch between them by clicking the thumbnails the top of the Mission Control window. Or use these methods, which work even when you're not in Mission Control: