A cloud Internet hosting service means that every single part of your world-wide web presence will be maintained by an individual server. For instance, your files and databases will be maintained by separate machines and since only one kind of processes will run on a server, each machine will perform better and will use its resources to the highest. Whether you'll get a genuine cloud service or not also depends on the control panel that you will use to handle your account. Since most control panels are designed to function on a single server, they can't work on a cloud platform whatever a given web hosting service provider could advertise. If one service stops responding, the whole server could go down, so your sites will not be accessible. This is the reason why you should check what service you'll actually receive if you are looking for cloud web hosting before you purchase anything.