A data breach refers to the unauthorized access, acquisition, or disclosure of sensitive or confidential data by cybercriminals or malicious insiders. Breaches can involve various types of information, including personal identification details, financial records, or proprietary company data. Organizations experience significant consequences, such as reputational damage, legal repercussions, and financial losses, after a data breach. Mitigating risks involves implementing strong security measures, conducting regular audits, and educating employees on best practices to protect against potential threats.