Health Check is a Setup page that scores how closely your org's security settings match a baseline and lists which settings are at risk so you can fix them in one place. Admins use it to review password, session, and related controls against the Salesforce Baseline Standard or a custom baseline, then remediate with Edit or Fix Risks. The score falls when settings are less restrictive than the baseline, and applying recommended values can change user access, so treat remediation as a security change rather than a number to maximize.