A virtual or a dedicated server is a standalone machine, which has its own Os and keeping the latter up-to-date is an important, albeit underestimated task. Not only can an update enhance the overall performance of your sites, but it will also save you lots of problems in the future. An update could be released for several reasons, the most widespread being to fix newly found security holes, which may allow third-party individuals to access and alter the content which you have on the server. You may also see an improved performance of your web programs because updates can also be released for better compatibility between the Operating System and the configuration it functions on in order to get the most out of the hardware. Additionally, if you keep your programs up-to-date, they might also need a later Operating system version which will have the needed software dependencies and will allow them to function effectively.