Overview
Spaces enables users to create multiple virtual desktops suited to the unique needs or work habits of the user. A user could, for example, create and assign a "space" to office work—enabling them to leave a work-related application (such as a Word processor or a Spreadsheet) running full-screen—and then switch to a different space designated for browsing the Internet, or navigating file structure in Finder windows. Up to 16 spaces can be created, and applications can be bound to specific spaces. There are various ways to navigate between spaces, including user-configured function-key combinations, hot corners (via Exposé), or by dragging windows and applications—in the direction of the desired space—to the corresponding edge of the screen, and holding for a moment until the space switches.
Read more about this topic: Spaces (software)