A virtual or a dedicated server is a standalone machine, which has its own Operating System and maintaining the latter up-to-date is a vital, albeit underrated task. Not simply can an update enhance the overall performance of your websites, but it can also save you a lot of problems later on. An update can be released for a number of reasons, the most frequent being to fix newly found security holes, which may allow third-party people to access and modify the content which you have on the server. You will also see an improved functionality of your web apps because updates could 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. Also, if you keep your applications up-to-date, they could also require a later OS version which will have the required software dependencies and will enable them to work adequately.