Before going into details of Cloud web hosting, let us see what a usual kind of web hosting is. Suppose you are a business owner and you have a web site. In a traditional web hosting service, you rent space on a single server which has some usage limit and if the site goes over the limit, server crashes or your account gets suspended. Then you have to move your site to another bigger server or purchase additional resources which cause more money and take additional time to set up your site.
Cloud web hosting companies uses Cloud computing and you can purchase as much computing power as you need. In other words, Cloud web hosting is a kind of hosting in which multiple servers are put to use at the same time to deal with traffic. 
You sign up with a cloud hosting company and put your site in their server and if there is a sudden surge in traffic, servers can be added from the cluster with no impact or downtime. After your demand is over, you will release the server back to the cloud and your customer will not feel any difference. Cloud hosting companies charge you only for resources that you use. It’s like pay-per-use thus you are saving money.
