Security – Servers are often high-end pieces of hardware that can cost a lot of money. They are less likely to be stolen or tampered with if stored in a server rack.
Cooling – Servers make a lot of heat, so they must be kept at the right temperature to work correctly. Server racks are made to allow as much airflow as possible, which helps remove hot air from the server’s environment.
Troubleshooting – Having all of your servers in one place makes it easy to figure out what’s wrong. Furthermore, server racks make it easy for people to get to both the front and back of any device, suitable for working in the area.