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 underrated task. Not simply can an update improve the functionality of your websites, but it could also save you lots of troubles down the road. An update may be released for many different reasons, the most frequent being to fix recently discovered security holes, which may allow third-party people to access and change the content which you have on the hosting server. You can also see an improved performance of your web applications since updates can also be released for better compatibility between the Operating System and the configuration it works on in order to get the most out of the hardware. In addition, if you keep your applications up-to-date, they might also require a later Operating system version which will have the needed software dependencies and will enable them to work properly.