A virtual or a dedicated server is a standalone machine, that has its own Operating System and always keeping the latter up-to-date is a crucial, although underestimated task. Not only can an update boost the functionality of your sites, but it could also save you lots of problems down the road. An update can be released for a number of reasons, the most widespread being to fix newly identified security holes, which may enable third-party individuals to access and change the content which you have on the server. You may also see an improved functionality of your web apps as updates might also be released for better compatibility between the Operating System and the configuration it works on so that you can get the most out of the hardware. Moreover, if you keep your applications up-to-date, they might also need a later OS version that will have the needed software dependencies and will permit them to operate adequately.