Who should go for Shared hosting ?
The users who just want a business website and do not need much resources can opt for shared hosting as the cost involved in shared hosting is nominal. If you are a start up company and want an online presence shared hosting is the best for you.
Who should go for a VPS ?
The users who have sites with huge volume of visits and complex tasks being executed VPS hosting is recommended. This is because such website requires high amount of resources and constant monitoring on the part of the server admin. VPS becomes bit expensive but if you need more resources it is better to go for a VPS.
Who should go for a Dedicated Server ?
Dedicated server is recommended for big companies and institutions who have huge data and perform multiple tasks and calculations. Dedicated server is expensive but you have full control over the server and you can install anything you require for your site. With a dedicated server you have ample resources to handle any volume of requests for your site