The Cloud is really just a collection of computers in a remote location that are connected to the internet and store your data. One advantage to saving your files in the Cloud is that you can access those files from multiple devices (as long as they have access to the internet). This means that you can start typing a document on one computer and finish it on another, or even on your smartphone.
Additional reasons to use the Cloud are that your files are always backed up, they are easily shareable as well as able to be collaborated on with other users. You are also saving the space on your computer's internal hard drive as you're not loading it with your files.
There are also some disadvantages to using the Cloud. The most obvious one is what happens when the internet is down? When there is no internet access, you won't have access to your files (or the most up-to-date ones). Another downfall is the risk of your Cloud account being hacked. As with any account online, your Cloud account is secured with a password, but if this information gets into the wrong hands, your files could be at risk.
Some Cloud services you may have heard of include Apple's iCloud, the Google Drive, Dropbox, Microsoft's OneDrive, and Amazon Drive.
For more in-depth information about setting up and using the Cloud, contact me for private tech lessons.