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