CentOS is amongst the most widely used Linux-based server Operating Systems out there. It's used by countless website hosting service providers, since it is very stable, secure and reliable, not to mention that it can be customized freely, since it's an open-source OS. CentOS is used for production servers, because it is also very fast and takes minimal resources. Furthermore, you will be able to install and run any web app, as long as it can run on a Linux device. If you use a CentOS-powered server, you are able to adjust any part of your Operating System according to your preferences. The fact that CentOS is absolutely free does mean that you'll have to pay just for your server, and not for any sort of license fees, that will minimize your overall expenses. A vast group of developers and users is behind CentOS, therefore if you ever encounter any problems, or you are simply unsure how to perform a certain task, you'll be able to discover a solution quickly. A significant benefit of the OS is also the fact that every single release is officially supported and updated for at least 10 years, so you will always have a secure and stable software environment.