The main difference of cloud servers is flexibility and configuration, as they can provide the exact level of control, security, and performance the user is after.
And the Shared hosting servers happen to have a similar degree of flexibility, but instead of focusing on your needs, they will involve you in a shared virtualized environment where many other users are waiting to be served.
On cloud hosting, you have complete freedom to scale the resources on demand, you don’t require to switch to VPS or dedicated servers whereas, with shared hosting, you have to switch your service once your website is grown to the certain level of popularity.
Not only that,cloud servers are equipped with failover protection to efficiently handle the failure of power or hard drive crashes.Traditional shared servers have no failover protection which results in greater downtime of maintenance.
Shared hosting is the most popular hosting solution that can suit even the most tight budget. But using a shared hosting solution also means that the user has to share the server resources with other users. If you are hosting your website with in an shared hosting service, this means all applications and data resources being used by your account, is also being shared with many other users on one server. Your website will share the same server resources as all other websites on the server such as CPU, Memory, disk space, bandwidth etc. The servers running shared hosting accounts are almost always fully loaded. If one website overloads the server, all users will suffer from low speed, limited disk space, memory issues, and/or downtime.
On the cloud, however, you will not have to worry about these issues. The cloud hosting environment is a dedicated hosting service that allows you to manage and maintain your website with in a server that is only dedicated to you. So this means that all resources allocated at the time of creation of your server that become available, are for you to use and you alone.