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, though underestimated task. Not only can an update enhance the overall performance of your sites, but it could also save you a lot of problems later on. An update may be released for several reasons, the most widespread being to fix newly found security holes, which may enable third-party people to access and modify the content you have on the hosting server. You can also see an improved efficiency of your web applications since updates may also be released for better compatibility between the Operating System and the configuration it operates on so that you can get the most out of the hardware. Moreover, if you keep your applications up-to-date, they could need a later Operating system version that will have the necessary software dependencies and will permit them to function adequately.