CentOS is one of the most widely used Operating Systems for website hosting servers. It's one of the countless Linux releases in existence, but what differentiates it from all the others is its long-term support, which ensures that you'll always have a stable and secure OS. Each CentOS version that is released is supported for a decade, which is longer than with almost every other OS available on the market. CentOS also has a much larger developer community than other distributions, therefore if you encounter any problem or have any questions, you will be able to instantly get the details that you need. CentOS is considered to be among the best server Operating Systems, as it's very stable and secure, that makes it very reliable even when you host private data. Since it is open-source, you're able to modify every part of it and personalize it according to your requirements, not to mention that the overall cost for a CentOS-based server will be lower, since you will not need to pay license fees of any sort.