The definition of IT operations and maintenance is the set of activities that are necessary to ensure the smooth running of an IT system. This includes tasks such as monitoring, troubleshooting, and patching, as well as regular maintenance and upgrades. It is a critical part of any IT system, as it ensures that the system is secure, reliable, and performing optimally. IT operations and maintenance are also responsible for ensuring that the system is compliant with applicable laws and regulations. The IT operations and maintenance team is typically responsible for responding to any issues that arise with the system, as well as providing support and guidance to users. By ensuring that the system is properly maintained and secure, IT operations and maintenance helps to ensure that the system is able to provide the best possible service to its users.