What is SSL?
SSL is an acronym for Secure Sockets Layer. SSL provides a secure connection, allowing you to transmit private data online. Sites secured with SSL display a padlock in the browsers URL and possibly a green address bar if secured by an EV SSL certificate.

The SSL protocol is used by millions of e-Business providers to protect their customers ensuring their online transactions remain confidential. In order to be able to use the SSL protocol, a web server requires the use of an SSL certificate.

Sites will get SSL encryption to cover any area that involves an exchange of data including login boxes, credit card payments, or any personal information. All web browsers have the ability to interact with SSL secured sites so long as the sites SSL is from a recognized Certificate Authority, such as Comodo.
 
Why You Need SSL On Your Site

The Internet has successfully created many new global business opportunities for enterprises conducting online commerce. However, that growth has also attracted fraudsters and cyber criminals.

The increasing awareness of online fraudsters and cyber criminals has presented an opportunity for ecommerce providers to capitalize on consumer fears by displaying trust indicators. Just like the real world, people need to be confident before they proceed down an unknown path.

 
How Does SSL Work?
When a SSL Digital Certificate is installed on a web site, users can see a padlock icon at the bottom area of the navigator. When an Extended Validation Certificates is installed on a web site, users with the latest versions of Firefox, Internet Explorer or Opera will see the green address bar at the URL area of the navigator.

Users on sites with SSL Certificates will also see https:// in the address bar during an ecommerce transaction.