Debian is a widespread Linux release, which is used primarily on desktop machines, still lots of people have begun using it lately as a web server Operating System as well, because of the stability and security it supplies. The latter is a result of the fact that Debian is developed and supported by numerous qualified volunteers all around the world, so that any patch which is required to fix a particular issue is released in a couple of days. The very same community will also help with any question or problem that a user may ever encounter, because they can be contacted through electronic mail using mailing lists and a qualified response will be sent in no more than 15-20 minutes. The advantage here is that all your questions will be responded to by the same people who have created the Operating System itself and they have a detailed knowledge of how it works. As Debian is absolutely free, you won't need to pay any license fees to use it and you can personalize it as much as you want or need. This is valid for both the Operating System as well as the 30.000+ software packages that are available for it.