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