Secure Sockets Layer, or SSL, is a protocol that is used to encode the information exchanged between a web server and its users. The practical application of employing an SSL is to preserve the data which visitors submit on your Internet site - a login page, a payment page if you run an online store, and so forth. Any information they type in in any box on the site will be submitted safely to the server, so their login or payment information will be protected from being accessed by unauthorized individuals. In general, an SSL certificate requires a dedicated IP address to be installed, which suggests the overall cost for your presence online shall be higher. While this might not exactly be an issue for a larger enterprise, it may matter for a non-profit organization or a small online store that doesn't generate big profits if additional money should be spent. This is the key reason why we've taken advantage of an extension called Server Name Indication (SNI) and we have made it possible to use a shared server IP address to set up an SSL certificate.