An advisory is an official notice issued by organizations, vendors, or security authorities to inform users about a newly discovered security vulnerability, threat, or risk. Advisories typically provide detailed information about the nature of the issue, its potential impact, affected systems or software, and recommended actions for mitigation or remediation. They are crucial for helping individuals and organizations stay informed about current cybersecurity risks and take timely measures to protect their systems and data. Regularly following advisories helps maintain strong security postures and reduces the likelihood of successful cyberattacks.