Secure Sockets Layer, or SSL, is a protocol that is used to encrypt the info exchanged between a hosting server and its users. The practical application of using an SSL is to secure the info which customers submit on your website - a login page, a payment page if you run a web-based store, etc. Any content they type in in any box on the site will be submitted securely to the server, so their login or payment details shall be protected from being accessed by unauthorized people. Usually, an SSL certificate requires a dedicated IP address to be set up, which means the overall cost for your online presence will be bigger. While this might not exactly be a problem for a larger business, it may matter for a non-profit organization or a small online shop which does not generate big income 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 install an SSL certificate.