If you're outgrowing your web hosting or simply want more control, a managed or fully managed VPS (Virtual Private Server) is the next logical choice for your hosting needs. It gives you more freedom with root access to Apache and PHP, plus you can install an SSL certificate, as well as any type of software - all without the responsibility of a physical dedicated server.
On a shared server, you rely on the performance of the platform provided. By choosing for VPS, you get to select a configuration best suited for your applications, requirements