Mac Spaces allows you to turn your Mac into having multiple monitors without having to have a physical monitor!? Say What… Basically it creates virtual spaces for you to work from and can be a great way to organise your work.
Spaces are controlled by Mission Control, which is an in-built application in your Mac.
The easiest way to access Mission Control is to swipe up with 3 fingers and then to move between spaces swipe with 3 fingers from right to left or left to right depending on which direction you want to move.
Here is a video to help you get started with using Mac Spaces: