There are two reasons:
Google Drive is arguably one of the best. The idea behind it is simple: Place any file in Drive and so long as you have Internet access, you’ll be able to view it on any device. Sure, Google isn’t the only company to offer this kind of service — but with its seamless integration with other Google services and a set of dead-simple collaboration tools, Drive easily stands out from the pack.
Using Drive isn’t tricky at all. In fact, it’s probably one of the easiest cloud services to start using. So rather than giving you a needlessly long tutorial, this guide offers a brief introduction to navigating and using the Drive interface, and also includes a few tips to help you get the most out of the service.