Unlike a shared server, which powers multiple sites, a dedicated server hosts just one site. Website stability and reliability are the twin benefits of investing in a dedicated server—your site leverages a server's full CPU, RAM, and storage resources, as it doesn't share them with other sites. You shouldn't underestimate the importance of these benefits in terms of site speed and reliability.
Providers often bill for dedicated servers on a fixed monthly price to include specific software packages. Over the years, software vendors realized the significant market opportunity to bundle their software with dedicated servers. They have since started introducing pricing models that allow dedicated hosting providers the ability to purchase and resell software based on reduced monthly fees.
A dedicated server, or computing server, is a server where all the physical resources of the machine are available. Unlike a virtual server, which uses a portion of the resources to run its virtualisation technology, a dedicated server allows you to benefit from all of the machine’s available RAM, storage, and computing power. With cloud computing, we can also define this type of solution as "bare metal", highlighting the physical availability of the machine’s resources, in contrast to standard solutions based on virtual instances.
The answer to this question largely depends on two factors. Are you new to server technology and not very interested? In this case, Windows is the easiest option to get where you want to go. Do you already have experience with Linux or would you like to familiarize yourself with this operating system? If so, Linux gives you more freedoms to configure your server, and you will be using an operating system that is less vulnerable to attacks from the Internet. Linux is also open source and therefore free.