Secure Sockets Layer, or SSL, is a protocol used to encrypt the data exchanged between a server and its users. The practical application of employing an SSL is to secure the info that visitors submit on your website - a login page, a payment page if you run an Internet store, etc. Any information they enter in any box on the site shall be submitted safely and securely to the server, so their login or payment details will be protected from being accessed by unauthorized people. Usually, an SSL certificate requires a dedicated IP address to be set up, which implies the overall cost for your online presence shall be bigger. While this might not exactly be an issue for a larger firm, it might matter for a non-profit organization or a small online shop that does not generate big earnings if additional money should be spent. That's the main reason why we have 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.