Explanation
Security Health Check is a tool that can be used to identify and fix potential session vulnerabilities. Security Health Check scans the security settings in an org and compares them to a baseline set of standards, such as the Salesforce Baseline Standard or the Salesforce Optimized Standard. Security Health Check provides a health check score and a list of issues and recommendations for improving the security settings. References:
https://help.salesforce.com/s/articleView?id=sf.security_health_check.htm&type=5