Server Side Includes (SSI) is a popular server-side scripting language, that is employed to add the content of one file inside of another file. It is used primarily with online content and it could help make a static HTML site more dynamic. If you'd like to have a daily quote shown on various webpages on your website, for instance, you can create a text file and replace the quote within it every single day. All web pages in which this file is integrated are going to display the modified quote, so you'll not have to alter every one of them by hand every time. SSI could also be used to include the output of basic functions instead of a static file - for example, the viewer's IP address, a hit counter or maybe the present time and date. In this way, you can make your site appear a lot more professional and a lot more appealing to the visitors. Pages that use SSI get a .shtml extension.