Server Side Includes (SSI) is a popular server-side scripting language, used to incorporate the content of one file inside another file. It's employed typically with online content and it can make a static HTML site a lot more dynamic. If you want to have a daily quote displayed on various web pages on your website, as an example, you can create a text file and switch the quote inside it every single day. All the webpages where this file is included will show the updated quote, so you will not need to edit them by hand every single time. SSI may also be used to contain the output of simple functions instead of a static file - for instance, the visitor's IP address, a hit counter or perhaps the current date and time. In this way, you may make your site appear more professional and more appealing to the site visitors. Web pages that employ SSI get a .shtml extension.