Server Side Includes (SSI) is a well-known server-side scripting language, employed to incorporate the content of one file within a second file. It is employed primarily with online content and it will help to make a static HTML website much more dynamic. If you need to have a daily quote shown on various pages on your site, as an example, you can create a text file and switch the quote inside it every single day. All of the pages where this file is incorporated will display the updated quote, so you will not need to change them by hand every single time. SSI could also be used to incorporate the output of simple functions as opposed to a static file - for instance, the client's IP address, a hit counter or maybe the current date and time. In this way, you may make your site seem a lot more professional and much more appealing to the website visitors. Web pages that employ SSI have a .shtml extension.