You might find yourself asking the question: What does a VPS provide that standard, shared hosting does not? There are many key differences in shared vs. VPS hosting. For one, shared hosting providers put more clients on the same physical machine than VPS providers. Shared servers can have hundreds of accounts, while VPS providers usually limit their machines to 10 clients per physical machine. This means more uptime and reliability for you.
Another key difference is root access. Root access is pretty simple, it just means that you can access files at the root of your account, but the implications are tremendous. With root access, you can change major environment variables such as PHP and MySQL configurations. With root access, you can adjust your memory limit and script execution time and have access to pretty much everything you would have access to on a dedicated server.
For these reasons, many people upgrade from shared to VPS hosting to help their site become successful. You can have much more control over your server and website when using a VPS host in comparison to a shared one. A VPS can be a good choice for small businesses with a tight budget as well are larger ones. If you are renting server space and don't have root access, your website is missing its full potential.