Emergency preparedness is the ability to respond quickly and effectively when a disruptive event occurs. In cyber security, that means having people, processes, and technical controls ready before an incident hits: incident-response playbooks, contact trees, backup and restore procedures, logging, isolation steps, and decision-making authority. Good preparedness does not prevent every attack, but it limits damage and speeds recovery.
It matters because many cyber incidents become worse when an organization cannot act fast. Ransomware, destructive malware, account takeover, cloud outages, and infrastructure failures all test readiness. A prepared team can contain spread, preserve evidence, restore services, and communicate clearly with stakeholders. Defenders measure this through tabletop exercises, drills, recovery tests, and post-incident reviews. In audits, emergency preparedness is shown by evidence that plans are current, tested, and tied to real operational risks rather than left as policy documents only.