A cloud hosting service means that each and every part of your world-wide web presence will be taken care of by an individual server. For example, your files and databases will be managed 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 resources to the highest. Whether you will get a genuine cloud service or not also depends on the CP that you'll use to control your account. As most control panels were intended to function on a single server, they cannot work on a cloud platform regardless of what a given web hosting service provider may advertise. In the event that one service stops responding, the whole server may go down, so your Internet sites will not be accessible. This is the reason why you should check what service you will actually receive if you are looking for cloud web hosting before you purchase anything.