A virtual or a dedicated server is a standalone machine, which has its own Operating System and keeping the latter up-to-date is an essential, although underestimated task. Not only can an update improve the functionality of your websites, but it will also save you a lot of troubles later on. An update may be released for a variety of reasons, the most prevalent being to fix newly discovered security holes, which may allow third-party people to access and modify the content that you have on the hosting server. You might also see an improved efficiency of your web programs because updates could also be released for better compatibility between the Os and the configuration it operates on in order to get the most out of the hardware. Also, if you keep your apps up-to-date, they could need a later OS version that will have the needed software dependencies and will permit them to operate properly.