Picks the right Netlify site-protection layer and disambiguates the three unrelated "auth" concepts users conflate — app-user login (Netlify Identity), site-load gating (Password Protection / project visibility), and dashboard SAML SSO. Use it when asked to password-protect a site or Deploy Preview, make a project private/public, restrict a site to your team, require SSO to view a site, set up company-wide app SSO, or invite users to a private project. Also use it for SSO-session symptoms on protected sites: "logged out mid-session", 401s after about an hour, or token expiry/refresh questions. Not for wiring auth code — route app-login setup to netlify-identity.