The term 'efficiency optimization' in IT systems refers to the process of improving system performance and resource utilization. This can involve various strategies, such as streamlining processes, automating repetitive tasks, and refining workflows to reduce waste and increase productivity. By optimizing efficiency, organizations can lower operational costs and enhance system scalability, ensuring that IT resources align with business goals. Ultimately, this leads to improved service delivery and better overall user experience within the organization's IT infrastructure.