It hides data from eavesdroppers. If a hacker intercepts the communication, they see a garbled mess of characters rather than your credit card number or password.
Once the browser trusts the certificate, they work together to create a "session key." This is a unique, temporary key used to encrypt all data for that specific visit. 4. The Move to "HTTPS Everywhere" SSL & TLS Essentials. Securing the Web free
At their core, SSL and TLS are cryptographic protocols designed to provide communications security over a computer network. It hides data from eavesdroppers