Nessus is a widely used vulnerability scanner developed by Tenable, Inc.. It helps organizations identify security weaknesses in their systems and networks. By scanning for known vulnerabilities, misconfigurations, and compliance issues, Nessus provides detailed reports that help IT professionals prioritize and remediate security risks. The tool supports various platforms and can scan a range of devices, including servers, workstations, and network devices. Nessus is known for its user-friendly interface and extensive plugin library, which allows it to stay updated with the latest vulnerabilities. This makes it a valuable resource for maintaining cybersecurity and protecting sensitive information.