It can be used for data centers to run the servers.
CentOS is a test bench for Red Hat. When Red Hat is testing new software, they will test it out in CentOS and Fedora. They will give it to the public, the public will complain about all the issues, then they will fix it, and include it in Red Hat.
I am not using it for the organization. However, I am using it in the business. For example, I help many clients back up Linux servers or protect Linux servers. But I am a Linux user at home, and I have been implementing products that revolve around Linux.