A virtual or a dedicated hosting server is a standalone machine, that has its own Os and always keeping the latter up-to-date is a vital, although underrated task. Not only can an update improve the performance of your websites, but it can also save you a lot of troubles in the future. An update could be released for a variety of reasons, the most widespread being to fix recently discovered security holes, which may permit third-party individuals to access and alter the content which you have on the hosting server. You can also see an improved functionality of your web apps as updates could also be released for better compatibility between the Os and the configuration it works on in order to get the most out of the hardware. Additionally, if you keep your applications up-to-date, they might need a later Operating system version which will have the needed software dependencies and will permit them to function properly.