A cloud web hosting service means that each part of your world-wide web presence will be taken care of by an individual server. For instance, your files and databases will be handled by separate machines and since just one single type of processes will run on a server, each machine will perform better and will use its system resources to the highest. Whether you'll get a genuine cloud service or not also depends on the CP that you'll use to control your account. Since most control panels were made to function on a single server, they can't work on a cloud platform regardless of what a given web hosting service provider may advertise. In case one service stops responding, the whole server could go offline, so your Internet sites won't be accessible. That's why you should check what service you'll actually receive in case you are looking for cloud internet hosting before you order anything.