The air-gap data protection method isolates local networks from the internet to mitigate cyber threats and protect sensitive data, which is commonly used by organizations dealing with confidential information such as personal, financial, medical, legal, and biometric data.  By eliminating internet connectivity, air-gap networks provide a high level of security against external attacks, ensuring compliance with regulations like GDPR, which is particularly valuable for industries like government, finance, defense, and healthcare, where data breaches can have severe consequences. Air-gapped networks, once considered impervious to attacks, have been breached using techniques like supply chain attacks and insider threats.

Source: GBHackers