Secure Sockets Layer, or SSL, is a protocol that is used to encode the info exchanged between a web server and its users. The practical application of employing an SSL is to protect the data that site visitors submit on your Internet site - a login page, a payment page if you run a web-based store, and so forth. Any info they input in any box on the website will be submitted safely to the server, so their login or payment information will be protected from being accessed by unauthorized individuals. Usually, an SSL certificate requires a dedicated IP address to be set up, which implies the overall cost for your presence online will be bigger. While this might not exactly be a problem for a larger company, 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. This is the key reason why we have 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 set up an SSL certificate.