What is a bitcoin dedicated server?

Could you elaborate on the concept of a Bitcoin dedicated server? I'm interested in understanding how it differs from a regular server and why it's specifically used for Bitcoin. Is it a server dedicated to mining Bitcoin? Or does it provide services such as secure wallet storage or transaction processing? Additionally, are there any particular hardware or software requirements for a Bitcoin dedicated server? Your insights would be greatly appreciated as I'm exploring options for setting up a secure and efficient Bitcoin-related infrastructure.