If you need more resources than the shared hosting can offers, this is the next step for a more powerful hosting solution.
 

It's a great upgrade that enables you to have your own slice of the hardware node dedicated for your sites. Other customers cannot affect your websites as they could do with a shared solution.
 

The VPS Hosting gives you the features and functionality of a dedicated server without the cost of building and maintaining one.

If you need to host unlimited domains, to have complete control of your hosting environment and run your own applications without the cost of a dedicated server, then your choice must be a VPS Hosting Plan.