CentOS is one of the most widely used Operating Systems for hosting servers. It's one of the numerous Linux distributions out there, but what differentiates it from the rest is the long-term support, which ensures that you will always have a reliable and risk-free Operating System. Each CentOS version that is released is supported for 10 years, which is longer than with another OS available. CentOS also has a much larger developer community than other distributions, therefore in case you encounter any kind of problem or have any questions, you are able to rapidly discover the data that you need. CentOS is considered to be one of the best server Operating Systems, because it's very stable and protected, that makes it really reliable even if you host sensitive info. Since it is open-source, you'll be able to modify any part of it and customize it according to your requirements, not to mention that the overall cost for a CentOS-based server will be lower, since you will not have to pay license fees of any type.