Keep your implementation running securely and smoothly with improved Platform-driven security solutions. Refine how users access your sites, apps, and implementations with domain improvements, built-in authenticators (generally available), single sign-on with Slack, and more authentication options. Preference Center (beta) joins the Privacy Center team, helping customers define their communication preferences. Shield products integrate with a wider range of features and clouds. View more metrics in Security Center. And the new Security Policies (beta) feature in Security Center helps you manage Health Check baselines from a central location for all tenants.
https://help.salesforce.com/s/articleView?id=release-notes.rn_security.htm&release=236&type=5