Secure Sockets Layer, or SSL, is a protocol used to encode the information exchanged between a web server and its users. The practical application of employing an SSL is to preserve the info which site visitors submit on your site - a login page, a payment page if you run an online store, etc. Any content they enter in any box on the website will be submitted safely and securely to the server, so their login or payment details shall be protected from being accessed by unauthorized people. Typically, an SSL certificate needs a dedicated IP address to be set up, which implies the overall cost for your presence online shall be bigger. While this might not be a problem for a larger business, it might matter for a non-profit organization or a small online store which does not generate big revenue if additional money should be spent. That is the reason why we've taken advantage of an extension known as Server Name Indication (SNI) and we've made it possible to use a shared server IP address to install an SSL certificate.