To explain it very briefly - cloud computing is where you do your work online, without having to use your local hard drive to save or run any of the programs. You should be able to access your work/programs from any computer or device that has access to the internet.  Think about how you access Facebook, Instagram or Snapchat.  These platforms are accessible from anywhere because they reside in the 'cloud'. 

There are many different programs that are stored in this way.  You are thinking of many right now, aren't you?!  It doesn't just stop at programs either, you can gain access to whole office suites, like Google Drive or Microsoft's OneDrive in the same way.  You don't need to install any software or save anything to your hard drive since it is all accessible on the internet, available on any device, anywhere in the world with internet access. Now you can see the benefits to cloud computing!