Actuarial data refers to statistical information used primarily by insurance companies to assess and predict risks. This data includes historical records on events like accidents, illnesses, or cyber incidents. By analyzing actuarial data, insurers can estimate the likelihood of future claims, determine appropriate premium rates, and manage their financial exposure. In cybersecurity, actuarial data helps insurers understand the frequency and impact of cyber threats, enabling them to design suitable cyber insurance policies and advise clients on risk management strategies.