HTTPS

Also called: SSL, TLS, SSL certificate, TLS certificate, certificate, SSL/TLS, secure site, padlock, http

The secure version of the way browsers talk to websites. It encrypts the traffic and uses a certificate to confirm the site controls its domain. SSL is the older name for TLS, the technology underneath.

For example: A browser shows a warning on a site whose certificate expired. The host renews the certificate and the warning goes away.