Server Side Includes (SSI) is a well-known server-side scripting language, employed to add the content of one file inside a second file. It's employed predominantly with online content and it can help make a static HTML site a lot more dynamic. If you want to have a daily quote shown on a number of web pages within your site, for instance, you can make a text file and replace the quote within it every day. All of the webpages in which this file is incorporated will show the modified quote, so you'll not need to change all of them personally each time. SSI could also be used to contain the output of basic functions instead of a static file - for instance, the client's IP address, a hit counter or perhaps the current date and time. This way, you may make your internet site seem far more professional and much more appealing to the website visitors. Web pages that implement SSI use a .shtml extension.