A virtual or a dedicated server is a standalone machine, that has its own Operating System and always keeping the latter up-to-date is an important, although underestimated task. Not simply can an update improve the overall performance of your internet sites, but it will also save you a lot of problems later on. An update can be released for a lot of reasons, the most frequent being to fix newly found security holes, which may allow third-party individuals to access and modify the content which you have on the hosting machine. You might also see an improved performance of your web applications as updates may also be released for better compatibility between the Operating System and the configuration it operates on in order to get the most out of the hardware. Moreover, if you keep your apps up-to-date, they could also require a later OS version which will have the necessary software dependencies and will enable them to operate effectively.