Secure Sockets Layer, or SSL, is a protocol employed to encrypt the information exchanged between a web server and its users. The practical application of using an SSL is to secure the information which customers submit on your site - a login page, a payment page if you run an Internet store, and so on. Any info they type in in any box on the site will be submitted securely to the server, so their login or payment details shall be protected from being accessed by unauthorized individuals. In general, an SSL certificate requires a dedicated IP address to be installed, which means the overall cost for your online presence shall be higher. While this may not be a problem for a larger enterprise, it might matter for a non-profit organization or a small online store that does not generate big income if additional money should be spent. That is the main reason why we've taken advantage of an extension referred to as Server Name Indication (SNI) and we've made it possible to use a shared server IP address to install an SSL certificate.