The advantage of a VPS system compare to dedicated hosting is that the price implied with shared hosting are greatly reduced.

Implications of shared and dedicated hosting:
Well ahead of the invention of VPS hosting came in shared hosting was more preferable choice because a website which is hosted on a particular server that hosts is having many other websites saves lots of money as the hosting cost would be shared by all the other websites. Using the trusted hosting solution an exclusive server naturally costs lot more money but the greatest disadvantage with shared hosting in such cases is that the limitation of what you can do for traffic of other websites and dependence on websites that share the server.