Server Side Includes (SSI) is a common server-side scripting language, used to add the content of one file inside of another file. It is utilized typically with online content and it could help make a static HTML website more dynamic. If you want to have a daily quote displayed on numerous web pages within your site, for instance, you can make a text file and switch the quote within it every single day. All the webpages where this file is included will show the modified quote, so you'll not have to modify every one of them by hand every time. SSI may also be used to incorporate the output of basic functions instead of a static file - for example, the visitor's IP address, a hit counter or the present date and time. In this way, you can make your site appear much more professional and a lot more appealing to the visitors. Pages that employ SSI have a .shtml extension.