https://www.extnoc.com/network-operations-center/noc-functionalities

NOC Services Functionalities
The focal point of organizations to control and monitor networks is the NOC. This is where the network operations are kept up to par through all the stages, ways and channels of communication available to the staff that is overseeing them. The ability to outsource these services and have them performed twenty-four hours a day allows companies to detect and fix issues immediately preventing downtime and loss profits. The benefits are increased when an experienced MSP such as ExterNetworks takes over the basic functions.

NOC Major Functions
The technical team of the NOC keeps an eye on the endpoints by managing and monitoring to resolve issues as they come up and prevent issues from occurring by taking preventative measures. Engineers, technicians, and other staff is free to perform other tasks.