A mirror domain is an alternative web address that hosts a duplicate of an original website. These domains are often used to ensure continued access to content when the main site is blocked, censored, or otherwise unavailable. Mirror domains replicate the content, structure, and functionality of the original site, allowing users to bypass restrictions imposed by governments, organizations, or ISPs. While mirror domains can be used for legitimate purposes, such as maintaining access to information in restrictive environments, they are also sometimes exploited for malicious activities, including phishing or distributing unauthorized content. Proper verification is essential before using a mirror domain to avoid security risks.