HTTPS uses TLS and certificates to protect data in transit between a browser and a named site, but it does not by itself secure the wider application.
HTTPS / SSL refers to the encrypted HTTP connection established through TLS and a certificate validated by the browser.
Meaning and boundaries
HTTPS protects the connection against many network-level risks, while application authorization, input handling and server configuration require their own controls.
Obtain and install a certificate for the public hostnames, redirect HTTP to the canonical HTTPS URLs, update internal references, then test the certificate chain, redirects and asset loading. Keep non-production endpoints outside public linking.
How to inspect it
Check the browser security panel, certificate names and expiry, HTTP-to-HTTPS redirects, mixed-content warnings, canonical tags and sitemap URLs. Test a representative page rather than only the homepage.
For an HTTPS migration, make a small hostname inventory: root host, www variant, localized hosts and any asset host loaded by the representative page. Test each HTTP variant for one direct permanent redirect to its HTTPS counterpart, then inspect the certificate name, expiry and chain in a browser. Load the page with developer tools open to find mixed HTTP images, fonts, scripts or API calls.
Limits, verification and common mistakes
A lock icon does not prove that content is correct, a seller is trustworthy or an account is safe. It reports a protected connection to the named host.
Check canonical tags, hreflang annotations, sitemap entries and internal links after the redirect rule is live. A certificate can be valid while a canonical still points to HTTP or an asset fails in the browser. The practical acceptance criterion is a consistently secure rendered route set, with unrelated application-security controls assessed separately.