Secure Sockets Layer (SSL) and Transport Layer Security (TLS) are the most commonly used security protocols today. It is essentially a protocol that provides a secure channel between two machines operating on the Internet or internal networks.
In today’s Internet-focused world, the SSL protocol is commonly used when a web browser needs to securely connect to a web server over the underlying unprotected Internet.
Technically, SSL is a transparent protocol that requires little interaction with the end user when establishing a secure session.
The website looks secure when the browser displays a padlock, or when the address bar displays both the padlock and the green bar. This is the key to SSL success, it is an incredibly simple experience for end users.