A cloud web hosting service means that each part of your world-wide web presence will be maintained by a different server. For example, your files and databases will be maintained by separate machines and since just one kind of processes will run on a server, every machine will perform better and will use its resources to the fullest. Whether you'll get a genuine cloud service or not also depends on the CP that you'll use to manage your account. Because most control panels are designed to operate on a single server, they can't work on a cloud platform regardless of what a given Internet hosting service provider may advertise. If one service stops responding, the entire server can go down, so your websites won't be accessible. This is the reason why you should check what service you'll actually get if you are looking for cloud internet hosting before you purchase anything.