A virtual or a dedicated server is a standalone machine, that has its own Operating System and keeping the latter up-to-date is an important, although underestimated task. Not simply can an update improve the performance of your sites, but it can also save you lots of problems in the future. An update could be released for a variety of reasons, the most frequent being to fix newly identified security holes, which may enable third-party individuals to access and modify the content you have on the server. You can also see an improved performance of your web programs because updates might also be released for better compatibility between the Operating System and the configuration it works on as a way to get the most out of the hardware. Also, if you keep your applications up-to-date, they may also need a later Operating system version which will have the needed software dependencies and will allow them to function adequately.