Dedicated server is a single computer with huge hardware resources like RAM, CPU and Disk Space. Dedicated server performs same as a computer but is situated in a Data Center in a network assigned with a static IP address so that it can be accessed online from any corner of the world.
Dedicated servers are usually available on Rental Basis from a Data center or your web Hosting service provider. Dedicated servers are highly customizable in terms of resources and the operating systems. These servers have extra slots on their Motherboard so that the hardware resources can be customized according to the requirement, like you can Increase or decrease the RAM and Hard Disk at any given time.
Dedicated servers are often used for applications, sites or software’s which require high computing power.
Data Centers prefer to use Blade servers to save space as a data center can have multiple Racks with 100’s of servers on it.
Web Hosting companies Rent Dedicated servers or use them to Create VPS (virtual private server) using virtualization technology.
Dedicated servers are also often used by gamers for online gaming or host gaming applications.