Web servers are those applications that are run on a physical hardware server machines for their effective running. It plays the more critical role in any web hosting process. The main role or job of a web server application is to serve the pages from the hardware memories that are requested by the end client machine or user. A web server runs on a method called as http which means hyper text transfer protocol. This is the standard communications protocol that works on the client-sever method to enable the communication between the server and the client machines. There are many server applications available in the software market and the web hosting companies rely on the more qualified and best server applications for their purpose of handling millions of users at the same time from around different parts of the world. Companies or people who provide the facilities of accessing our websites world wide are known as web hosting rating. People can choose their best suited hosts through web hosting reviewsand web hosting rating. When a remote machine clicks on a link or types on an address for a website display, the server application gets activated and responds the remote machine with the appropriate data or the web page in no time.