The iCloud is actually super handy. You can access your data anywhere and anytime. Even if your MacBook crashes, your files are still safely in the Cloud. For a (beginner) Apple user it can take some time to get used to working with the iCloud, but leapp is of course not the worst and is happy to explain it to you ;)
Why do you need iCloud?
Simply put: iCloud is Apple's (free) online cloud service. It is a bit like Dropbox. Which means that you can open files that you save in iCloud from any device. You can also use iCloud to store data or make a backup . The latter is especially useful. If you buy a new iPhone , you can immediately transfer all your settings. No more hassle with manually entering phone numbers.